Bank Branches › Closed and merged banks › Illinois
Closed and merged banks in Illinois
1,603 FDIC-insured banks with their main office in Illinois have ended since 1970. 255 of them failed; the rest merged or closed on their own. 1,532 can be followed to a bank that is open today, named in the last column.
| Bank | Years | Today it is part of |
|---|---|---|
| 1st Equity Bank NorthwestBuffalo Grove | 2003–2020 | 1st Equity Bank |
| 1st Oak Brook BankGlenview · 3 earlier names | 1953–1994 | Fifth Third Bank, National Association |
| 1st State Bank of Mason CityMason City | 1977–2021 | Alliance Community Bank |
| ABC BankChicago · 2 earlier names | 1891–2018 | Old Second National Bank |
| Abingdon Bank and Trust CompanyAbingdon | 1930–1990 | Wells Fargo Bank, National Association |
| Advance BankLansing · 2 earlier names | 1902–2003 | Citizens Bank, National Association |
| Advance Bank, s.b.Lansing · 1 earlier name | 1990–1999 | Citizens Bank, National Association |
| Affiliated BankFranklin Park · 2 earlier names | 1954–1991 | Bank of America, National Association |
| Affiliated Bank/ChicagoChicago | 1988–1990 | Bank of America, National Association |
| Affiliated Bank/DuPageAddison · 1 earlier name | 1973–1990 | Bank of America, National Association |
| Affiliated Bank/Morton GroveMorton Grove · 1 earlier name | 1975–1990 | Bank of America, National Association |
| Affiliated Bank/North Shore NationalChicago · 2 earlier names | 1922–1990 | Bank of America, National Association |
| Affiliated Bank/Western NationalCicero · 1 earlier name | 1913–1990 | Bank of America, National Association |
| A J Smith Federal Savings BankMidlothian · 1 earlier name | 1924–2019 | Peoples Bank |
| Algonquin State BankAlgonquin · 2 earlier names | 1902–2024 | no successor |
| A Lincoln Savings AssociationRiver Forest | 1922–1977 | Bank of America, National Association |
| All American BankDes Plaines | 2005–2011 | International Bank of Chicago |
| All American Bank of ChicagoChicago | 1970–1995 | U.S. Bank National Association |
| Allegiance Community BankTinley Park | 1999–2010 | Byline Bank |
| Alliance FSBNiles | 1999–2001 | Peoples Bank |
| Alliance Savings and Loan AssociationChicago | 1915–1982 | Bank of America, National Association |
| Allied Savings and Loan AssociationChicago | 1929–1981 | Hoyne Savings Bank |
| Allstate BankNorthbrook · 1 earlier name | 1998–2012 | no successor |
| Alpha Community BankToluca · 1 earlier name | 1870–2008 | Morton Community Bank |
| Alpine Bank & Trust Co.Rockford · 2 earlier names | 1962–2018 | Midland States Bank |
| Alpine Savings BankHighland · 1 earlier name | 1974–1999 | FCB Banks |
| AmBank IllinoisCasey · 2 earlier names | 1963–1997 | Regions Bank |
| Ambank Illinois, National AssociationRobinson · 2 earlier names | 1932–1999 | Regions Bank |
| Amcore Bank, AledoAledo · 2 earlier names | 1935–1999 | BMO Bank National Association |
| AMCORE Bank, Ashton-RochelleAshton · 2 earlier names | 1869–1995 | BMO Bank National Association |
| AMCORE Bank CarpentersvilleCarpentersville · 2 earlier names | 1970–1991 | BMO Bank National Association |
| Amcore Bank ColonialRockford · 1 earlier name | 1964–1989 | BMO Bank National Association |
| AMCORE Bank, GridleyGridley · 3 earlier names | 1891–1996 | BMO Bank National Association |
| Amcore Bank, National AssociationDixon · 2 earlier names | 1871–1995 | BMO Bank National Association |
| Amcore Bank, National AssociationRockford · 3 earlier names | 1931–2010 | BMO Bank National Association |
| Amcore Bank, National Association, North CentralMendota · 2 earlier names | 1932–1999 | BMO Bank National Association |
| Amcore Bank National Association, NorthwestWoodstock · 2 earlier names | 1934–1999 | BMO Bank National Association |
| Amcore Bank National Association, PekinPekin · 1 earlier name | 1887–1992 | Commerce Bank |
| Amcore Bank National Association, PeruPeru · 1 earlier name | 1933–1996 | BMO Bank National Association |
| Amcore Bank National Association, Rock River ValleyDixon · 2 earlier names | 1905–1999 | BMO Bank National Association |
| AMCORE Bank, Ogle CountyMount Morris · 1 earlier name | 1877–1993 | BMO Bank National Association |
| AMCORE Bank, PrincetonPrinceton · 1 earlier name | 1902–1996 | BMO Bank National Association |
| Americana Federal Savings and Loan Association of ChicagoChicago | 1975–1980 | Bank of America, National Association |
| American Bank of Illinois in HighlandHighland · 1 earlier name | 1922–2001 | First Mid Bank & Trust, National Association |
| American Bank of Rock IslandRock Island | 1968–1999 | American Bank and Trust Company, National Association |
| American Bank & Trust CompanySpringfield · 2 earlier names | 1972–1988 | United Community Bank |
| American Chartered BankSchaumburg | 1987–2016 | Fifth Third Bank, National Association |
| American Chartered Bank of BartlettBartlett | 1992–1994 | Fifth Third Bank, National Association |
| American Chartered Bank of Lake ZurichLake Zurich | 1989–1994 | Fifth Third Bank, National Association |
| American Eagle Bank of ChicagoChicago | 2007–2020 | American Eagle Bank |
| American Enterprise BankBuffalo Grove | 1995–2018 | no successor |
| American Federal Savings and Loan Association of IllinoisPekin | 1883–1984 | Fifth Third Bank, National Association |
| American Heritage Bank of Granite CityGranite City · 1 earlier name | 1959–1988 | U.S. Bank National Association |
| American Heritage Savings, FABloomingdale | 1961–1984 | no successor |
| American Home BankChicago · 4 earlier names | 1987–2011 | no successor |
| American Midwest BankSycamore · 3 earlier names | 1973–2016 | Heartland Bank and Trust Company |
| American National Bank and TrustLibertyville · 1 earlier name | 1904–1995 | JPMorgan Chase Bank, National Association |
| American National Bank and Trust Co.Rockford | 1910–1985 | BMO Bank National Association |
| American National Bank and Trust Company of ChicagoChicago | 1928–2002 | JPMorgan Chase Bank, National Association |
| American National Bank and Trust Company of Waukegan, IllinoisWaukegan | 1958–1994 | Fifth Third Bank, National Association |
| American National Bank of Arlington HeightsArlington Heights · 1 earlier name | 1937–1993 | JPMorgan Chase Bank, National Association |
| American National Bank of BensenvilleBensenville · 3 earlier names | 1918–1993 | JPMorgan Chase Bank, National Association |
| American National Bank of ElginElgin · 1 earlier name | 1892–1993 | JPMorgan Chase Bank, National Association |
| American National Bank of LansingLansing · 1 earlier name | 1963–1992 | JPMorgan Chase Bank, National Association |
| American National Bank of LibertyvilleLibertyville · 2 earlier names | 1933–1994 | JPMorgan Chase Bank, National Association |
| American National Bank of LisleLisle · 2 earlier names | 1961–1991 | JPMorgan Chase Bank, National Association |
| American National Bank of Melrose ParkMelrose Park · 1 earlier name | 1958–1993 | JPMorgan Chase Bank, National Association |
| American Savings and Loan AssociationMount Carmel | 1908–1990 | Fifth Third Bank, National Association |
| American Savings Association of Mt. Carmel, F.A.Mount Carmel | 1990–1991 | Fifth Third Bank, National Association |
| American Savings BankSpringfield · 1 earlier name | 1879–1988 | Bank of America, National Association |
| American Savings Bank of DanvilleDanville · 1 earlier name | 1888–2005 | First Financial Bank, National Association |
| American Security Federal Savings and Loan AssociationChicago | 1924–1990 | Marquette Bank |
| American State BankBradley | 1979–1983 | PNC Bank, National Association |
| American Union Savings and Loan Association, S.B.Chicago · 1 earlier name | 1925–2015 | Central Savings, f.s.b. |
| AmericaUnited Bank and Trust Company USASchaumburg · 2 earlier names | 1965–2011 | Heartland Bank and Trust Company |
| Amerifed Bank, FSBJoliet · 2 earlier names | 1934–1995 | JPMorgan Chase Bank, National Association |
| Amerimac Savings Bank, FSBHillsboro · 2 earlier names | 1962–1990 | Constitution Bank, National Association |
| Amity Federal Bank for SavingsTinley Park · 1 earlier name | 1893–1994 | BMO Bank National Association |
| Anchor BankThird Lake | 1991–2003 | Associated Bank, National Association |
| Anchor Federal Savings and Loan AssociationAlton | 1904–1982 | Fifth Third Bank, National Association |
| Andalusia Community BankAndalusia | 1979–2018 | Midwest Bank |
| Anna State BankAnna | 1930–2026 | Alliance Bank |
| Antioch Savings and Loan AssociationAntioch | 1960–1983 | no successor |
| Archer BankChicago · 1 earlier name | 1962–2013 | Byline Bank |
| Archer Federal Savings and Loan AssociationChicago | 1911–1991 | The Huntington National Bank |
| Arcola First BankArcola · 1 earlier name | 1874–2024 | Peoples Bank & Trust |
| Arcola Homestead Savings BankArcola · 1 earlier name | 1883–2010 | no successor |
| Area BankRosiclare · 1 earlier name | 1920–2014 | Banterra Bank |
| Argo Federal Savings and Loan AssociationSummit · 1 earlier name | 1908–1987 | no successor |
| Arlington Heights Federal Savings and Loan AssociationArlington Heights | 1953–1989 | Citibank, National Association |
| Arlington Heights Savings Association, F.A.Arlington Heights | 1989–1990 | Citibank, National Association |
| Arthur Homesteadand Loan AssociationArthur | 1889–1978 | Bank of America, National Association |
| Ashland State BankChicago | 1954–1997 | Old Second National Bank |
| Ashley State BankAshley | 1901–1988 | Regions Bank |
| Ashmore State BankAshmore | 1920–1986 | Bank of America, National Association |
| Associated BankChicago · 1 earlier name | 1966–1998 | Associated Bank, National Association |
| Associated Bank ChicagoChicago · 2 earlier names | 1975–2005 | Associated Bank, National Association |
| Associated Bank Illinois, National AssociationRockford | 1998–2003 | Associated Bank, National Association |
| Astoria Building and Loan AssociationAstoria | 1885–1978 | Associated Bank, National Association |
| Atkinson Trust & Savings BankAtkinson | 1881–1983 | Wells Fargo Bank, National Association |
| Auburn Peoples BankAuburn | 1976–1988 | United Community Bank |
| Aurora National BankAurora | 1934–2000 | Popular Bank |
| Austin Federal Savings and Loan Association of ChicagoChicago | 1930–1981 | Citibank, National Association |
| Avenue Bank of Oak ParkOak Park · 1 earlier name | 1899–1995 | U.S. Bank National Association |
| Avondale Federal Savings BankChicago | 1911–1999 | Fifth Third Bank, National Association |
| Avon Savings and Loan AssociationAvon | 1911–1977 | First Bank |
| Ayars State BankMoweaqua | 1920–2000 | First National Bank of Nokomis |
| AztecAmerica BankBerwyn | 2005–2014 | Republic Bank of Chicago |
| Banco Popular de Puerto RicoChicago | 1893–1995 | no successor |
| Banco Popular, IllinoisMelrose Park · 3 earlier names | 1914–1999 | Popular Bank |
| Banco Popular, IllinoisRiver Grove · 3 earlier names | 1975–1997 | Popular Bank |
| Bank Calumet National AssociationChicago Heights · 1 earlier name | 1935–1997 | Old National Bank |
| BankChicagoChicago · 2 earlier names | 1960–2003 | Old National Bank |
| BankFinancial, National AssociationOlympia Fields · 4 earlier names | 1924–2026 | First Financial Bank |
| Bank Hapoalim B.M.Chicago | 1921–2006 | no successor |
| Bank Leumi Le-Israel, B.M.Chicago | 1902–1997 | Valley National Bank |
| Bank of America IllinoisChicago · 3 earlier names | 1857–1997 | Bank of America, National Association |
| Bank of Atkinson, National AssociationAtkinson | 1983–1988 | Wells Fargo Bank, National Association |
| Bank of Boulder HillMontgomery | 1979–1986 | Fifth Third Bank, National Association |
| Bank of Buffalo GroveBuffalo Grove | 1969–1994 | PNC Bank, National Association |
| Bank of CahokiaCahokia | 1962–1988 | Regions Bank |
| Bank of ChenoaChenoa | 1950–2001 | Heartland Bank and Trust Company |
| Bank of ChestnutChestnut | 1902–2023 | Longview Community Bank |
| Bank of Chicago-LakeshoreChicago · 1 earlier name | 1947–1992 | The Huntington National Bank |
| Bank of Chicago-Little Village/Banco de Chicago-La VillitaChicago · 2 earlier names | 1904–1992 | The Huntington National Bank |
| Bank of Chicago, S.B.Chicago · 3 earlier names | 1965–1997 | The Huntington National Bank |
| Bank of Dallas CityDallas City | 1960–1999 | Connection Bank |
| Bank of DanvilleDanville | 1970–1984 | Old National Bank |
| Bank of De SotoDe Soto | 1920–1994 | Old National Bank |
| Bank of DwightDwight | 1855–2010 | Bank of Pontiac |
| Bank of EvansvilleEvansville | 1895–1999 | Buena Vista National Bank |
| Bank of FindlayFindlay | 1971–1993 | Shelby County State Bank |
| Bank of GalesburgGalesburg | 1891–1986 | Old National Bank |
| Bank of Gibson CityGibson City | 1979–2025 | Longview Community Bank |
| Bank of HinsdaleHinsdale | 1967–1994 | JPMorgan Chase Bank, National Association |
| Bank of Homewood, National AssociationHomewood · 1 earlier name | 1946–2001 | Old National Bank |
| Bank of IllinoisNormal · 1 earlier name | 1914–2010 | Heartland Bank and Trust Company |
| Bank of Illinois in Mt. VernonMount Vernon | 1965–1998 | Old National Bank |
| Bank of Illinois, National AssociationMount Vernon · 1 earlier name | 1902–2000 | Old National Bank |
| Bank of LaddLadd · 1 earlier name | 1889–1998 | North Central Bank |
| Bank of LincolnwoodLincolnwood | 1954–2009 | Republic Bank of Chicago |
| Bank of LockportLockport | 1971–1998 | BMO Bank National Association |
| Bank of LyonsLyons | 1949–1998 | Old National Bank |
| Bank of MattesonMatteson · 1 earlier name | 1973–1999 | Old National Bank |
| Bank of ModestoModesto | 1891–2017 | Warren-Boynton State Bank |
| Bank of MontgomeryMontgomery | 1972–2023 | Waterman Bank |
| Bank of Northern IllinoisGlenview · 1 earlier name | 1960–1995 | Associated Bank, National Association |
| Bank of PalatinePalatine | 1975–2014 | Pan American Bank & Trust |
| Bank of PalmyraPalmyra | 1952–2002 | Heartland Bank and Trust Company |
| Bank of QuincyQuincy | 1999–2015 | HomeBank |
| Bank of ShorewoodShorewood · 1 earlier name | 1978–2011 | Heartland Bank and Trust Company |
| Bank of Sugar GroveSugar Grove | 1975–2000 | Old Second National Bank |
| Bank of Tokyo-MitsubishiChicago · 1 earlier name | 1964–1998 | no successor |
| Bank of UrbanaUrbana · 1 earlier name | 1970–1991 | Busey Bank |
| Bank of ViolaViola | 1949–1988 | Farmers State Bank of Western Illinois |
| Bank of WarrensburgWarrensburg · 1 earlier name | 1975–2008 | Buena Vista National Bank |
| Bank One, Bloomington-NormalBloomington · 3 earlier names | 1902–1997 | JPMorgan Chase Bank, National Association |
| Bank One, Champaign-UrbanaChampaign · 2 earlier names | 1899–1997 | JPMorgan Chase Bank, National Association |
| Bank One, ChicagoChicago · 2 earlier names | 1973–1993 | JPMorgan Chase Bank, National Association |
| Bank One, Chicago, National AssociationEvanston · 3 earlier names | 1933–1997 | JPMorgan Chase Bank, National Association |
| Bank One, ElginElgin · 2 earlier names | 1965–1993 | JPMorgan Chase Bank, National Association |
| Bank One, Illinois, National AssociationSpringfield · 3 earlier names | 1851–2002 | JPMorgan Chase Bank, National Association |
| Bank One, LaGrangeLa Grange · 3 earlier names | 1969–1993 | JPMorgan Chase Bank, National Association |
| Bank One, MonticelloMonticello · 2 earlier names | 1945–1992 | JPMorgan Chase Bank, National Association |
| Bank One, National AssociationChicago · 1 earlier name | 1863–2004 | JPMorgan Chase Bank, National Association |
| Bank One, PeoriaPeoria · 2 earlier names | 1931–1997 | JPMorgan Chase Bank, National Association |
| Bank One, Quad Cities, National AssociationMoline · 1 earlier name | 1869–1998 | JPMorgan Chase Bank, National Association |
| Bank One, Rockford, National AssociationRockford · 1 earlier name | 1854–1997 | JPMorgan Chase Bank, National Association |
| Bank One, WilmetteWilmette · 2 earlier names | 1905–1993 | JPMorgan Chase Bank, National Association |
| Bankplus, FSBMorton · 2 earlier names | 1919–2007 | Heartland Bank and Trust Company |
| Bank South, Federal Savings BankHarrisburg · 1 earlier name | 1960–1993 | Old National Bank |
| Bank Usa Savings AssociationSilvis · 1 earlier name | 1978–1990 | Tbk Bank, SSB |
| Banterra Bank GroupEldorado · 2 earlier names | 1947–1998 | Banterra Bank |
| Banterra Bank of ChristopherChristopher · 1 earlier name | 1943–1998 | Banterra Bank |
| Banterra Bank of Hamilton CountyMcleansboro · 1 earlier name | 1947–1995 | Banterra Bank |
| Banterra Bank of Norris CityNorris City · 1 earlier name | 1904–1995 | Banterra Bank |
| Banterra Bank of West FrankfortWest Frankfort · 1 earlier name | 1940–1998 | Banterra Bank |
| Bartelso Savings BankBartelso | 1920–2000 | Germantown Trust & Savings Bank |
| Bartonville BankBartonville | 1930–2004 | Better Banks |
| Baytree National Bank & Trust CompanyLake Forest | 2000–2015 | The Federal Savings Bank |
| Bell Federal Savings and Loan AssociationChicago | 1925–1996 | Bank of America, National Association |
| Bellwood Savings and Loan AssociationBellwood | 1958–1977 | JPMorgan Chase Bank, National Association |
| Belmont National Bank of ChicagoChicago | 1946–1995 | Fifth Third Bank, National Association |
| Benchmark BankAurora · 2 earlier names | 1898–2009 | Fifth Third Bank, National Association |
| Ben Franklin Savings and Loan AssociationOak Brook | 1921–1987 | Citibank, National Association |
| Benld Loan AssociationBenld | 1921–1993 | Associated Bank, National Association |
| Best Hometown BankCollinsville · 1 earlier name | 1887–2020 | First National Bank of Waterloo |
| Bethalto Mercantile Bank, National AssociationBethalto · 1 earlier name | 1976–1988 | U.S. Bank National Association |
| Bethalto National BankBethalto | 1946–1992 | U.S. Bank National Association |
| Beverly BankChicago | 1923–1996 | Citizens Bank, National Association |
| Beverly Bank-MattesonMatteson · 1 earlier name | 1965–1996 | Citizens Bank, National Association |
| Beverly Bank of LockportLockport | 1988–1996 | Citizens Bank, National Association |
| Beverly National BankWilmington · 1 earlier name | 1863–1998 | Citizens Bank, National Association |
| Black Hawk Federal Savings and Loan AssociationRock Island | 1887–1989 | American Bank and Trust Company, National Association |
| Black Hawk Savings and Loan Association, F.A.Rock Island | 1989–1990 | American Bank and Trust Company, National Association |
| Blackhawk State Bank, S.B.Rochelle · 2 earlier names | 1960–1998 | First Mid Bank & Trust, National Association |
| Bloomingdale Bank and TrustBloomingdale | 1991–2006 | Northbrook Bank and Trust Company, National Association |
| Blue Island Federal Savings and Loan AssociationBlue Island | 1887–1975 | Citizens Bank, National Association |
| Bluestem National BankFairbury · 1 earlier name | 1918–2013 | Bank of Pontiac |
| Boatmen's Bank of Franklin CountyBenton · 2 earlier names | 1937–1997 | Bank of America, National Association |
| Boatmen's Bank of QuincyQuincy · 1 earlier name | 1909–1997 | Bank of America, National Association |
| Boatmen's Bank of South Central IllinoisMount Vernon · 2 earlier names | 1910–1997 | Bank of America, National Association |
| Boatmen's Bank of ZeiglerZeigler · 1 earlier name | 1922–1992 | Bank of America, National Association |
| Boatmen's National Bank of BenldBenld · 1 earlier name | 1905–1992 | Bank of America, National Association |
| Boatmen's National Bank of Central IllinoisHillsboro · 2 earlier names | 1882–1997 | Bank of America, National Association |
| Boatmen's National Bank of Coles CountyCharleston · 2 earlier names | 1934–1997 | Bank of America, National Association |
| Bowen State BankBowen | 1930–2005 | The Bank of Advance |
| Bradford Banking CompanyBradford | 1920–1994 | Peoples National Bank of Kewanee |
| Bradley BankBradley · 3 earlier names | 1911–1996 | Midland States Bank |
| Bridgeview Bank and Trust CompanyBridgeview · 1 earlier name | 1971–1993 | Old National Bank |
| Bridgeview Bank GroupBridgeview · 5 earlier names | 1973–2019 | Old National Bank |
| Brighton Federal Savings and Loan AssociationChicago | 1914–1978 | Citibank, National Association |
| Brimfield BankBrimfield · 1 earlier name | 1913–2016 | CBI Bank & Trust |
| Broadview Savings and Loan AssociationBroadview | 1898–1981 | no successor |
| Broadway BankChicago | 1979–2010 | Fifth Third Bank, National Association |
| Brookfield Federal Bank for SavingsBrookfield · 1 earlier name | 1921–1991 | Citibank, National Association |
| Brown County State BankMount Sterling | 1901–2016 | United Community Bank |
| Buffalo Prairie State BankBuffalo Prairie | 1920–2015 | CBI Bank & Trust |
| Builders BankChicago | 1997–2017 | no successor |
| Burlington BankBurlington · 2 earlier names | 1919–2000 | Old Second National Bank |
| Burr Ridge Bank and TrustBurr Ridge · 1 earlier name | 2009–2013 | Busey Bank |
| Busey Bank of McLean CountyLe Roy · 1 earlier name | 1924–1996 | Busey Bank |
| Busey First National BankUrbana | 1868–1987 | Busey Bank |
| Bushnell Federal Savings and Loan AssociationBushnell | 1911–1985 | Heartland Bank and Trust Company |
| Calumet Federal Savings and Loan AssociationChicago | 1910–1999 | U.S. Bank National Association |
| Cambridge BankLake Zurich | 1996–2008 | Byline Bank |
| Canton State BankCanton | 1949–1996 | Wells Fargo Bank, National Association |
| Capaha Bank, SBTamms · 1 earlier name | 1955–2017 | Southern Bank |
| Capitol Bank and TrustChicago · 2 earlier names | 1962–1997 | Popular Bank |
| Capitol Bank of WestmontWestmont · 1 earlier name | 1976–1997 | Popular Bank |
| Capitol Federal Bank for SavingsChicago · 2 earlier names | 1923–1991 | Bank of America, National Association |
| Capitol Federal Savings of AmericaEvergreen Park | 1907–1988 | The Huntington National Bank |
| Carbondale Savings and Loan AssociationCarbondale | 1888–1983 | Regions Bank |
| Cardunal Savings Bank, FSBWest Dundee · 3 earlier names | 1962–2007 | U.S. Bank National Association |
| Carmi Savings and Loan AssociationCarmi | 1910–1980 | Fifth Third Bank, National Association |
| Cary Grove Savings and Loan AssociationFox River Grove | 1934–1982 | JPMorgan Chase Bank, National Association |
| Castle Bank Harvard, National AssociationHarvard · 1 earlier name | 1877–2000 | First National Bank of Omaha |
| Castle Bank, National AssociationDekalb · 1 earlier name | 1859–2010 | First National Bank of Omaha |
| Castle Bank National AssociationSandwich · 1 earlier name | 1856–2000 | First National Bank of Omaha |
| Catlin BankCatlin · 1 earlier name | 1904–2023 | The Fisher National Bank |
| Center Bank - Glen EllynGlen Ellyn · 2 earlier names | 1962–1991 | JPMorgan Chase Bank, National Association |
| Central BankAshkum | 1975–2010 | Iroquois Farmers State Bank |
| Central BankFairview Heights · 4 earlier names | 1869–1998 | U.S. Bank National Association |
| Central Bank FultonFulton · 2 earlier names | 1902–2004 | Central Bank Illinois |
| Central Bank-Glen CarbonEdwardsville · 2 earlier names | 1914–1988 | U.S. Bank National Association |
| Central Bank-Granite CityGranite City · 1 earlier name | 1910–1988 | U.S. Bank National Association |
| Central City Savings and Loan AssociationPeoria | 1884–1976 | First Bank |
| Central Dupage Federal Savings and Loan AssociationWheaton | 1923–1981 | Bank of America, National Association |
| Centralia Savings BankCentralia · 2 earlier names | 1879–2000 | Midland States Bank |
| Central Illinois BankChampaign · 1 earlier name | 1959–1998 | CIBM Bank |
| Central Illinois BL and Homestead AssociationClinton | 1894–1982 | Regions Bank |
| Central Illinois Savings, A FAVirden · 1 earlier name | 1884–1986 | no successor |
| Central National Bank of MattoonMattoon | 1910–1998 | U.S. Bank National Association |
| Centrue BankKankakee · 1 earlier name | 1920–2006 | Midland States Bank |
| Centrue BankStreator · 3 earlier names | 1874–2017 | Midland States Bank |
| Century Federal Savings BankChicago · 1 earlier name | 1926–1991 | Byline Bank |
| Century Federal Savings Bank, FSBChicago | 1991–1992 | Byline Bank |
| Cerro Gordo Building and Loan, s.b.Cerro Gordo · 1 earlier name | 1886–2002 | State Bank of Bement |
| Champaignloan and BuildingaChampaign | 1889–1982 | Bank of America, National Association |
| Champion Federal Savings and Loan AssociationBloomington · 1 earlier name | 1941–1993 | PNC Bank, National Association |
| Chapin State BankChapin | 1892–2000 | Heartland Bank and Trust Company |
| Charleston Community BankCharleston · 1 earlier name | 1982–1992 | First Mid Bank & Trust, National Association |
| Charleston Federal Savings and Loan AssociationCharleston | 1882–2008 | First Federal Savings and Loan Association of Central Illinois, S.B. |
| Charter Bank and Trust of IllinoisHanover Park · 1 earlier name | 1970–1993 | Barrington Bank & Trust Company, National Association |
| Charter Bank, S.B.Sparta · 2 earlier names | 1894–1999 | Regions Bank |
| Charter National Bank and TrustHoffman Estates · 2 earlier names | 1980–2012 | Barrington Bank & Trust Company, National Association |
| Chesterfield Federal Savings and Loan Association of ChicagoChicago | 1924–2004 | PNC Bank, National Association |
| Chicago City Bank and Trust CompanyChicago | 1893–1999 | U.S. Bank National Association |
| Chicago Community BankChicago · 2 earlier names | 1934–2011 | Byline Bank |
| Chicago Federal Savings and Loan AssociationChicago | 1933–1982 | Citibank, National Association |
| Chicago Savings and Loan AssociationChicago | 1924–1982 | JPMorgan Chase Bank, National Association |
| Chillicothe Federal Savings and Loan AssociationChillicothe | 1888–1990 | Busey Bank |
| Chillicothe State BankChillicothe | 1971–1995 | Commerce Bank |
| CIB BankHillside · 1 earlier name | 1964–2004 | First Bank |
| Cicero State BankCicero | 1907–1982 | Fifth Third Bank, National Association |
| Cisne State BankCisne | 1902–2000 | TrustBank |
| Citibank, Federal Savings BankChicago · 2 earlier names | 1933–1991 | Citibank, National Association |
| Citizen Savings and Loan AssociationWillowbrook | 1911–1981 | Fifth Third Bank, National Association |
| Citizens Bank and Trust Company of ChicagoChicago | 2000–2010 | Republic Bank of Chicago |
| Citizens Bank of Illinois, National AssociationMount Vernon · 1 earlier name | 1959–1998 | Fifth Third Bank, National Association |
| Citizens Bank of Illinois, National AssociationMt. Vernon · 1 earlier name | 1937–1997 | Fifth Third Bank, National Association |
| Citizens Bank of TolonoTolono | 1920–1991 | Busey Bank |
| Citizens Building AssociationUrbana | 1888–1982 | PNC Bank, National Association |
| Citizens Community Bank of DecaturDecatur | 1995–2006 | Buena Vista National Bank |
| Citizens Federal Savings and Loan Association of MattesonMatteson | 1914–1985 | U.S. Bank National Association |
| Citizens First National BankPrinceton · 1 earlier name | 1865–2012 | Heartland Bank and Trust Company |
| Citizens First National Bank of GenoaGenoa · 1 earlier name | 1930–1994 | Heartland Bank and Trust Company |
| Citizens First National Bank of OglesbyOglesby · 1 earlier name | 1941–1991 | Heartland Bank and Trust Company |
| Citizens First National Bank of PeruPeru · 2 earlier names | 1969–1993 | Heartland Bank and Trust Company |
| Citizens First State Bank of WalnutWalnut · 2 earlier names | 1920–2022 | Community State Bank |
| Citizens National BankMacomb · 1 earlier name | 1890–2009 | Morton Community Bank |
| Citizens National Bank of Downers GroveDowners Grove | 1940–1994 | U.S. Bank National Association |
| Citizens National Bank & Trust Company of ChicagoChicago · 1 earlier name | 1946–1991 | U.S. Bank National Association |
| Citizens SavingsBelleville | 1885–1981 | Bank of America, National Association |
| Citizens Savings and Loan AssociationEast Alton | 1937–1988 | Fifth Third Bank, National Association |
| Citizens Savings and Loan Association of SpringfieldSpringfield | 1895–1989 | Regions Bank |
| Citizens Savings and Loan Association of Springfield, F.A.Springfield | 1989–1990 | Regions Bank |
| Citizens Savings BankBloomington · 2 earlier names | 1888–2005 | Busey Bank |
| Citizens State Bank of CropseyCropsey | 1918–2010 | Morton Community Bank |
| Citizens State Bank of Pleasant HillPleasant Hill | 1903–1988 | First Bank |
| Citizens State Bank of ShipmanShipman | 1926–2011 | Heartland Bank and Trust Company |
| City Bank of Bloomington-NormalBloomington · 1 earlier name | 1943–1995 | U.S. Bank National Association |
| City Bank of CarbondaleCarbondale · 2 earlier names | 1914–1988 | Regions Bank |
| City Bank of ChampaignChampaign · 1 earlier name | 1975–1987 | Busey Bank |
| City Bank-RankinRankin · 1 earlier name | 1947–1988 | Old National Bank |
| City Potomac BankPotomac · 2 earlier names | 1903–1993 | Old National Bank |
| Civic Federal Savings BankChicago · 1 earlier name | 1912–1992 | Byline Bank |
| Clearing BankChicago | 1975–1991 | Fifth Third Bank, National Association |
| Clover Leaf BankEdwardsville · 2 earlier names | 1945–2006 | First Mid Bank & Trust, National Association |
| Clyde Federal Savings and Loan AssociationNorth Riverside | 1914–1990 | Fifth Third Bank, National Association |
| Clyde Federal Savings AssociationNorth Riverside | 1990–1991 | Fifth Third Bank, National Association |
| CNB Bank and Trust, N.A.Carlinville · 1 earlier name | 1888–2026 | Heartland Bank and Trust Company |
| Coal City National BankCoal City · 3 earlier names | 1912–1998 | Midland States Bank |
| Colchester State BankColchester | 1963–2023 | no successor |
| Coles County National Bank of CharlestonCharleston | 1960–1982 | First Mid Bank & Trust, National Association |
| Coles County Savings and Loan AssociationCharleston | 1884–1982 | PNC Bank, National Association |
| Cole Taylor BankChicago · 2 earlier names | 1978–2014 | Fifth Third Bank, National Association |
| Cole Taylor Bank/Ford CityChicago · 2 earlier names | 1966–1989 | Fifth Third Bank, National Association |
| Cole Taylor Bank/MainWheeling · 2 earlier names | 1969–1989 | Fifth Third Bank, National Association |
| Cole Taylor Bank/SkokieSkokie · 1 earlier name | 1957–1989 | Fifth Third Bank, National Association |
| Cole Taylor Bank/YorktownLombard · 1 earlier name | 1968–1992 | Fifth Third Bank, National Association |
| Colona Avenue State BankEast Moline | 1966–1989 | Tbk Bank, SSB |
| Colonial BankChicago · 1 earlier name | 1954–1995 | U.S. Bank National Association |
| Colonial Bank and Trust Co. of Bureau CountyPrinceton · 2 earlier names | 1984–1992 | Heartland Bank and Trust Company |
| Colonial Bank of Granite CityGranite City | 1976–1988 | Regions Bank |
| Colonial Bank of SycamoreSycamore | 1991–1991 | First National Bank of Omaha |
| Colonial Savings and Loan AssociationPalos Hills | 1941–1976 | Bank of America, National Association |
| Columbia National BankColumbia | 1976–2019 | FCB Banks |
| Columbia National Bank-BelmontChicago · 1 earlier name | 1886–1991 | Bank of America, National Association |
| Columbia National Bank of ChicagoChicago | 1964–1997 | Bank of America, National Association |
| Columbian Federal Savings and Loan AssociationMount Carmel | 1893–1982 | Fifth Third Bank, National Association |
| Columbian Savings and Loan AssociationCharleston | 1892–1989 | First Financial Bank, National Association |
| Columbia Savings and Loan AssociationColumbia | 1914–1982 | Associated Bank, National Association |
| Columbus Savings BankChicago · 1 earlier name | 1913–2014 | Central Savings, f.s.b. |
| Commerce BankBloomington · 2 earlier names | 1869–1996 | Commerce Bank |
| Commerce Bank, National AssociationPeoria · 1 earlier name | 1863–2004 | Commerce Bank |
| Commerce Bank of Tazewell County, National AssociationDelavan · 1 earlier name | 1887–1994 | Commerce Bank |
| Commerce Bank of Woodford County, National AssociationMetamora · 2 earlier names | 1885–1994 | Commerce Bank |
| Commercial National Bank of ChicagoChicago | 1945–1996 | Fifth Third Bank, National Association |
| Commercial National Bank of PeoriaPeoria | 1885–1990 | PNC Bank, National Association |
| Commercial Savings and Loan Association of Urbana, IllinoisUrbana | 1907–1983 | Regions Bank |
| Commercial State Bank of WaterlooWaterloo | 1882–2009 | Midland States Bank |
| Community BankHoopeston · 1 earlier name | 1913–2015 | First Farmers Bank & Trust Co. |
| Community Bank of DivernonDivernon | 1963–1988 | United Community Bank |
| Community Bank of DuPageDowners Grove | 2006–2011 | Byline Bank |
| Community Bank of GalesburgGalesburg · 2 earlier names | 1967–2008 | Tompkins State Bank |
| Community Bank of Greater PeoriaEast Peoria · 2 earlier names | 1934–1993 | no successor |
| Community Bank of Greater PeoriaEast Peoria · 1 earlier name | 1955–1988 | no successor |
| Community Bank of HopedaleHopedale | 1964–2004 | The First National Bank in Tremont |
| Community Bank of LemontLemont | 2001–2009 | U.S. Bank National Association |
| Community Bank of MahometMahomet | 1961–1991 | Busey Bank |
| Community Bank of Oak Park River ForestOak Park | 1996–2019 | Byline Bank |
| Community Bank of PittsfieldPittsfield | 1999–2006 | First Bank |
| Community Bank of PlanoPlano | 1943–1998 | BMO Bank National Association |
| Community Bank of TrentonTrenton | 1963–2025 | Dieterich Bank |
| Community Bank of UticaUtica | 1959–1997 | La Salle State Bank |
| Community Banks of Shelby CountyCowden · 2 earlier names | 1892–2022 | United Fidelity Bank, fsb |
| Community Bank & Trust CompanyCanton | 1965–1990 | Wells Fargo Bank, National Association |
| Community Bank & Trust Company of EdgewaterChicago | 1974–1995 | U.S. Bank National Association |
| Community Bank-Wheaton/Glen EllynGlen Ellyn | 1994–2015 | Wheaton Bank & Trust, National Association |
| Community Federal Savings BankEast Moline | 1990–1990 | Tbk Bank, SSB |
| Community First BankFairview Heights | 1988–2015 | First Mid Bank & Trust, National Association |
| Community First Bank - ChicagoChicago | 2005–2011 | Northbrook Bank and Trust Company, National Association |
| Community National BankMetropolis · 1 earlier name | 1884–2004 | MidCountry Bank |
| Community National Bank of QuincyQuincy | 1971–1983 | First Bankers Trust Company, National Association |
| Community Savings BankEast Moline · 1 earlier name | 1958–1990 | Tbk Bank, SSB |
| Community Savings BankMarion · 2 earlier names | 1963–1996 | Regions Bank |
| Community State BankSalem | 1959–1995 | Bank of America, National Association |
| Community Trust BankIrvington | 1934–2023 | The Bradford National Bank of Greenville |
| Concordia Federal Bank for SavingsLansing · 1 earlier name | 1889–1990 | Citizens Bank, National Association |
| Continental Community Bank and Trust CompanyAurora · 1 earlier name | 1954–2004 | First Bank |
| Continental Illinois Bank - South SuburbanOlympia Fields · 1 earlier name | 1975–1988 | Citizens Bank, National Association |
| Cooperative Federal Savings and Loan AssociationWestmont | 1907–1991 | Fifth Third Bank, National Association |
| Co-Operative Federal Savings BankWestmont | 1991–1991 | Fifth Third Bank, National Association |
| Corn Belt BankBloomington | 1891–1985 | PNC Bank, National Association |
| Corn Belt Bank and Trust CompanyPittsfield · 2 earlier names | 1946–2009 | Heartland Bank and Trust Company |
| Cornerstone Bank & Trust, National AssociationCarrollton · 1 earlier name | 1854–2011 | Heartland Bank and Trust Company |
| Corus Bank, National AssociationChicago · 3 earlier names | 1913–2009 | Fifth Third Bank, National Association |
| Cosmopolitan Bank and TrustChicago | 1991–2006 | U.S. Bank National Association |
| Country BankAledo | 2000–2011 | Blackhawk Bank & Trust |
| Countryside BankCountryside · 1 earlier name | 1975–2019 | Hinsdale Bank & Trust Company, National Association |
| Countryside BankMount Prospect | 1969–1992 | JPMorgan Chase Bank, National Association |
| Countryside Bank of StratfordBloomingdale | 1989–1992 | JPMorgan Chase Bank, National Association |
| County National BankHillsboro · 1 earlier name | 1869–1995 | Constitution Bank, National Association |
| Covenant BankChicago · 1 earlier name | 1977–2013 | Liberty Bank and Trust Company |
| Covest Banc, National AssociationDes Plaines · 3 earlier names | 1934–2004 | Old National Bank |
| C. P. Burnett & Sons, BankersEldorado | 1921–2006 | First Southern Bank |
| Crane Savings and Loan AssociationHickory Hills | 1926–1977 | The Huntington National Bank |
| Crest Federal Savings and Loan AssociationKankakee | 1989–1990 | Peoples Bank of Kankakee County |
| Crest SavingsKankakee · 1 earlier name | 1956–1989 | Peoples Bank of Kankakee County |
| Cumberland County National Bank in NeogaNeoga | 1933–1992 | First Mid Bank & Trust, National Association |
| Damen National BankSchaumburg · 2 earlier names | 1916–1999 | Fifth Third Bank, National Association |
| Deerbrook State BankDeerfield | 1972–1992 | Devon Bank |
| Deerfield Federal Savings and Loan AssociationDeerfield | 1927–1995 | JPMorgan Chase Bank, National Association |
| Delaware Place BankChicago · 1 earlier name | 1976–2018 | Wintrust Bank, National Association |
| Diamond Bank, FSBSchaumburg · 2 earlier names | 1886–2013 | Wintrust Bank, National Association |
| Dixon Home Savings and Loan Association, FADixon | 1887–1983 | U.S. Bank National Association |
| Dolton-Riverdale Savings and Loan AssociationDolton | 1911–1992 | no successor |
| Downers Grove National BankWestmont | 1955–2011 | First Financial Bank |
| Downstate National BankAltamont · 1 earlier name | 1934–1994 | First Mid Bank & Trust, National Association |
| Downstate National BankBrookport · 1 earlier name | 1903–1998 | Old National Bank |
| Drexel National BankChicago | 1888–1995 | Providence Bank & Trust |
| DuPage National BankWest Chicago · 1 earlier name | 1891–2014 | Republic Bank of Chicago |
| DuPage Valley State BankWoodridge | 1990–1995 | Old National Bank |
| Dupo State Savings BankDupo | 1913–1988 | Regions Bank |
| Du Quoin National BankDu Quoin | 1949–1996 | Fifth Third Bank, National Association |
| Durand State BankDurand | 1957–2022 | Solutions Bank |
| Eagle Bank of Champaign County, National AssociationRantoul · 1 earlier name | 1899–1993 | Busey Bank |
| Eastern Illinois Trust and Savings BankMomence | 1971–1990 | Municipal Trust and Savings Bank |
| Economy Savings and Loan AssociationChicago | 1949–1981 | no successor |
| Edens BankWilmette · 2 earlier names | 1971–2011 | Byline Bank |
| Edgebrook BankChicago | 2005–2015 | Republic Bank of Chicago |
| EdgeMark Bank - LombardLombard · 2 earlier names | 1945–1994 | Fifth Third Bank, National Association |
| EdgeMark Bank - RosemontRosemont | 1989–1994 | Fifth Third Bank, National Association |
| Edgewood BankCountryside | 1967–1995 | Fifth Third Bank, National Association |
| EFS BankElgin · 4 earlier names | 1924–2006 | PNC Bank, National Association |
| Elkville State BankElkville | 1906–2013 | Murphy-Wall State Bank and Trust Company |
| Elliott State BankJacksonville | 1866–1998 | U.S. Bank National Association |
| Elmhurst Federal Savings BankElmhurst · 1 earlier name | 1954–1993 | Citizens Bank, National Association |
| Enterprise Savings Bank, FAChicago · 2 earlier names | 1902–1990 | Associated Bank, National Association |
| Erie State BankErie | 1945–2011 | First State Bank of Forrest |
| Evanston Federal Savings and Loan AssociationEvanston | 1950–1980 | Citibank, National Association |
| Evergreen Bank GroupOak Brook · 2 earlier names | 1999–2025 | Old Second National Bank |
| Evergreen Federal Savings and Loan AssociationEvergreen Park | 1956–1982 | JPMorgan Chase Bank, National Association |
| Ewing State BankEwing | 1919–1983 | U.S. Bank National Association |
| Exchange BankGardner | 1871–1999 | Old National Bank |
| Exchange Bank of DuPage, Oak Brook, IllinoisOak Brook | 1988–1990 | Bank of America, National Association |
| Exchange Bank of Lake CountyVernon Hills | 1988–1990 | Bank of America, National Association |
| Exchange National Bank of ChicagoChicago | 1926–1982 | Bank of America, National Association |
| Fairbury Federal Savings and Loan AssociationFairbury | 1887–1995 | Busey Bank |
| Fairfield Savings Bank, F.S.B.Long Grove · 1 earlier name | 1901–2003 | The Huntington National Bank |
| Fairview Heights Community BankFairview Heights | 1975–1987 | Regions Bank |
| Fairway SavingsOrland Park | 1915–1976 | JPMorgan Chase Bank, National Association |
| Farmer City State BankFarmer City | 1941–2012 | Heartland Bank and Trust Company |
| Farmers and Merchants BankSycamore | 1970–1991 | Heartland Bank and Trust Company |
| Farmers and Merchants Bank of CarlinvilleCarlinville · 1 earlier name | 1904–1998 | U.S. Bank National Association |
| Farmers' and Traders' State BankShabbona | 1905–2012 | First State Bank |
| Farmers and Traders State Bank of MeredosiaMeredosia | 1887–2000 | Prairie State Bank and Trust |
| Farmers & Mechanics BankGalesburg · 2 earlier names | 1869–2021 | CBI Bank & Trust |
| Farmers-Merchants Bank of IllinoisJoy · 1 earlier name | 1921–2024 | Merchants Bank of Indiana |
| Farmers-Merchants National Bank of PaxtonPaxton | 1914–2018 | Merchants Bank of Indiana |
| Farmers National Bank of GriggsvilleGriggsville | 1943–2025 | Eagle Valley Bank |
| Farmers State Bank, AstoriaAstoria · 1 earlier name | 1981–2011 | Better Banks |
| Farmers State Bank Chadwick and Mount CarrollMount Carroll · 1 earlier name | 1909–2001 | Tbk Bank, SSB |
| Farmers State Bank of AstoriaAstoria | 1944–1981 | Better Banks |
| Farmers State Bank of BensonBenson | 1913–1989 | Commerce Bank |
| Farmers State Bank of Camp PointCamp Point | 1921–2017 | United Community Bank |
| Farmers State Bank of CarlockCarlock | 1903–1971 | no successor |
| Farmers State Bank of DanforthDanforth | 1915–2019 | First Trust Bank of Illinois |
| Farmers State Bank of FerrisCarthage | 1905–1997 | Midland States Bank |
| Farmers State Bank of Fulton CountyLewistown | 1982–2011 | Prairie State Bank and Trust |
| Farmers State Bank of LewistownLewistown | 1894–1982 | Prairie State Bank and Trust |
| Farmers State Bank of McNabbMcnabb · 1 earlier name | 1903–1998 | First State Bank |
| Farmer's State Bank of PalestinePalestine | 1898–1995 | Regions Bank |
| Farmers' State Bank of Sheffield, Ill.Sheffield | 1906–1987 | BMO Bank National Association |
| Farmers State Bank of SomonaukSomonauk | 1900–2005 | Heartland Bank and Trust Company |
| Farmers State Bank of SubletteSublette | 1920–2016 | no successor |
| Farmers State Bank of ValmeyerValmeyer | 1909–1994 | First Bank |
| Fayette County BankSaint Elmo | 1894–2017 | United Fidelity Bank, fsb |
| Federated Bank of ChebanseChebanse · 1 earlier name | 1977–1986 | Federated Bank |
| Fidelity Federal Savings and Loan AssociationGalesburg | 1892–1989 | First Bank |
| Fidelity Federal Savings and Loan Association of BerwynBerwyn | 1904–1988 | JPMorgan Chase Bank, National Association |
| Fidelity Federal Savings AssociationGalesburg | 1989–1990 | First Bank |
| Fidelity Federal Savings BankChicago · 1 earlier name | 1906–2003 | PNC Bank, National Association |
| Fidelity Savings and Loan Association of DanvilleDanville | 1884–1990 | Old National Bank |
| Fidelity Savings Bank, F.S.B.Danville | 1990–1990 | Old National Bank |
| Financial Security Savings and Loan AssociationElk Grove Village | 1925–1981 | no successor |
| Fireside Federal Savings and Loan AssociationCicero | 1911–1985 | U.S. Bank National Association |
| First American BankBuffalo Grove · 1 earlier name | 1912–1991 | First American Bank |
| First American BankChicago · 3 earlier names | 1903–1991 | First American Bank |
| First American BankChicago · 2 earlier names | 1957–1991 | First American Bank |
| First American BankHanover Park · 2 earlier names | 1976–1991 | First American Bank |
| First American BankJoliet · 3 earlier names | 1960–1999 | First American Bank |
| First American Bank of AuroraAurora | 1964–1990 | Fifth Third Bank, National Association |
| First American Bank of HampshireHampshire · 1 earlier name | 1882–1986 | First American Bank |
| First American Bank of KankakeeKankakee · 3 earlier names | 1962–1999 | First American Bank |
| First American Savings and Loan AssociationOak Brook | 1968–1989 | Republic Bank of Chicago |
| Firstar Bank DuPageGlen Ellyn · 3 earlier names | 1912–1994 | U.S. Bank National Association |
| Firstar Bank Geneva, National AssociationGeneva · 1 earlier name | 1907–1993 | U.S. Bank National Association |
| Firstar Bank IllinoisChicago · 5 earlier names | 1934–1999 | U.S. Bank National Association |
| Firstar Bank North ShoreDeerfield · 1 earlier name | 1920–1994 | U.S. Bank National Association |
| Firstar Bank Park ForestPark Forest · 2 earlier names | 1953–1994 | U.S. Bank National Association |
| Firstar Bank Quad Cities, N.A.Moline · 2 earlier names | 1930–1995 | U.S. Bank National Association |
| Firstar Bank U.S.A., National AssociationWaukegan · 1 earlier name | 1995–2001 | U.S. Bank National Association |
| Firstar North Shore BankNorthbrook · 1 earlier name | 1976–1993 | U.S. Bank National Association |
| First BankChester · 2 earlier names | 1890–1993 | First Bank |
| First BankHavana · 1 earlier name | 1953–1992 | First Bank |
| First BankJohnston City · 2 earlier names | 1904–1989 | First Bank |
| First BankLawrenceville · 2 earlier names | 1909–1992 | First Bank |
| First BankO'Fallon · 3 earlier names | 1903–1997 | First Bank |
| First BankPittsfield · 1 earlier name | 1865–1989 | First Bank |
| First BankRed Bud · 2 earlier names | 1895–1988 | First Bank |
| First BankSalem · 1 earlier name | 1870–1992 | First Bank |
| First BankWest Frankfort · 1 earlier name | 1964–1992 | First Bank |
| First Bank and Trust CompanyCairo | 1859–1993 | First National Bank |
| First Bank and Trust Company in GreenvilleGreenville · 1 earlier name | 1869–1989 | First Bank |
| First Bank and Trust Co. of Williamson CountyMarion · 1 earlier name | 1971–1988 | U.S. Bank National Association |
| First Bank, bcCapron · 1 earlier name | 1946–2003 | First Mid Bank & Trust, National Association |
| First Bank National AssociationChicago · 2 earlier names | 1921–1997 | U.S. Bank National Association |
| First Bank NorthFreeport · 2 earlier names | 1936–1997 | Fifth Third Bank, National Association |
| First Bank of CarbondaleCarbondale · 1 earlier name | 1963–1989 | First Bank |
| First Bank of ChannahonChannahon | 1977–1988 | Busey Bank |
| First Bank of Columbia, National AssociationColumbia · 1 earlier name | 1919–1988 | First Bank |
| First Bank of EurekaEureka · 1 earlier name | 1882–1997 | Heartland Bank and Trust Company |
| First Bank of Fayette CountyVandalia · 1 earlier name | 1871–1989 | First Bank |
| First Bank of Loves ParkLoves Park | 1974–1993 | JPMorgan Chase Bank, National Association |
| First Bank of Oak ParkOak Park | 1922–2006 | U.S. Bank National Association |
| First Bank of RoscoeRoscoe | 1979–1993 | JPMorgan Chase Bank, National Association |
| First Bank of the Americas, S.S.B.Chicago · 1 earlier name | 1901–2005 | First Bank |
| First Bank of WashingtonWashington · 1 earlier name | 1858–1997 | Heartland Bank and Trust Company |
| First Bank SouthDixon · 3 earlier names | 1933–1997 | Fifth Third Bank, National Association |
| First Bank & TrustEvanston · 1 earlier name | 1995–2018 | Byline Bank |
| First Bank & Trust,Paris · 3 earlier names | 1887–2018 | First Mid Bank & Trust, National Association |
| First Capital BankPeoria | 1996–2005 | Busey Bank |
| First Chicago Bank for Savings, F.S.B.Frankfort · 2 earlier names | 1961–1992 | Old National Bank |
| First Chicago Bank of Arlington HeightsArlington Heights · 3 earlier names | 1972–1988 | JPMorgan Chase Bank, National Association |
| First Chicago Bank of Bloomingdale, National AssociationBloomingdale · 3 earlier names | 1971–1993 | JPMorgan Chase Bank, National Association |
| First Chicago Bank of Evanston, National AssociationEvanston · 2 earlier names | 1961–1992 | JPMorgan Chase Bank, National Association |
| First Chicago Bank of Lincoln ParkChicago | 1989–1991 | JPMorgan Chase Bank, National Association |
| First Chicago Bank of Oak ParkOak Park · 1 earlier name | 1892–1992 | JPMorgan Chase Bank, National Association |
| First Chicago Bank of RavenswoodChicago · 1 earlier name | 1962–1992 | JPMorgan Chase Bank, National Association |
| First Chicago Bank of St. Charles, National AssociationSt. Charles · 3 earlier names | 1976–1993 | JPMorgan Chase Bank, National Association |
| First Chicago Bank of WinnetkaWinnetka · 1 earlier name | 1894–1992 | JPMorgan Chase Bank, National Association |
| First Chicago Bank & TrustChicago · 3 earlier names | 1905–2011 | Northbrook Bank and Trust Company, National Association |
| First Chicago Investment Advisors, National AssociationChicago | 1984–1990 | no successor |
| First Choice BankGeneva | 2001–2011 | Byline Bank |
| First Clover Leaf Bank, National AssociationEdwardsville · 2 earlier names | 1921–2017 | First Mid Bank & Trust, National Association |
| First Colonial Bank/HighwoodHighwood · 1 earlier name | 1963–1995 | U.S. Bank National Association |
| First Colonial Bank/MundeleinMundelein · 2 earlier names | 1975–1995 | U.S. Bank National Association |
| First Colonial Bank/NorthlakeNorthlake · 2 earlier names | 1960–1995 | U.S. Bank National Association |
| First Colonial Bank NorthwestNiles · 2 earlier names | 1971–1995 | U.S. Bank National Association |
| First Colonial Bank of Downers GroveDowners Grove · 3 earlier names | 1974–1995 | U.S. Bank National Association |
| First Colonial Bank of DuPage CountyNaperville · 2 earlier names | 1972–1995 | U.S. Bank National Association |
| First Colonial Bank of Elk GroveElk Grove Village · 2 earlier names | 1979–1993 | U.S. Bank National Association |
| First Colonial Bank of Lake CountyVernon Hills | 1988–1995 | U.S. Bank National Association |
| First Colonial Bank of McHenry CountyCrystal Lake | 1991–1995 | U.S. Bank National Association |
| First Colonial Bank/RosemontRosemont · 1 earlier name | 1977–1995 | U.S. Bank National Association |
| First Colonial Bank SouthwestBurbank · 1 earlier name | 1974–1995 | U.S. Bank National Association |
| First Community BankElgin | 1993–2016 | St. Charles Bank & Trust Company, National Association |
| First Community Bank, National AssociationOlney · 3 earlier names | 1883–2005 | First Financial Bank, National Association |
| First Community Bank of Homer Glen & LockportHomer Glen | 2008–2013 | Busey Bank |
| First Community Bank of JolietJoliet | 2004–2013 | Busey Bank |
| First Community Financial BankJoliet · 1 earlier name | 2008–2017 | Busey Bank |
| First Community National BankRockford · 1 earlier name | 1965–1985 | JPMorgan Chase Bank, National Association |
| First Community National BankRockford · 1 earlier name | 1977–1990 | JPMorgan Chase Bank, National Association |
| First Community State BankStaunton | 1969–2014 | Bank of Springfield |
| First Cook Community Bank, F.S.B.Chicago · 2 earlier names | 1936–1994 | Republic Bank of Chicago |
| First County BankNew Baden · 2 earlier names | 1915–2017 | FCB Banks |
| First Crawford State BankRobinson · 1 earlier name | 1902–2005 | First Financial Bank, National Association |
| First Dupage BankWestmont | 1999–2009 | Old National Bank |
| First Farmers State BankMinier · 2 earlier names | 1875–2021 | Bank of Pontiac |
| First Federal BankColchester · 2 earlier names | 1917–2008 | Heartland Bank and Trust Company |
| First Federal Bank, FSBWaukegan · 1 earlier name | 1919–1998 | Old National Bank |
| First Federal of Elgin, F.S.A.Elgin · 2 earlier names | 1986–1993 | Fifth Third Bank, National Association |
| First Federal Savings and Loan Association of AuroraAurora | 1891–1976 | The Huntington National Bank |
| First Federal Savings and Loan Association of Crystal LakeCrystal Lake | 1953–1979 | Citibank, National Association |
| First Federal Savings and Loan Association of DixonDixon | 1955–1981 | Associated Bank, National Association |
| First Federal Savings and Loan Association of East AltonEast Alton | 1907–1990 | Regions Bank |
| First Federal Savings and Loan Association of ElginElgin | 1925–1988 | Fifth Third Bank, National Association |
| First Federal Savings and Loan Association of FreeportFreeport | 1893–1988 | U.S. Bank National Association |
| First Federal Savings and Loan Association of Fulton CountyCanton | 1882–1982 | MidAmerica National Bank |
| First Federal Savings and Loan Association of KewaneeKewanee | 1882–2016 | Union Federal Savings and Loan Association |
| First Federal Savings and Loan Association of LansingLansing | 1926–1982 | Citizens Bank, National Association |
| First Federal Savings and Loan Association of Macon CoDecatur | 1953–1990 | First Mid Bank & Trust, National Association |
| First Federal Savings and Loan Association of MattoonMattoon · 1 earlier name | 1889–2015 | Washington Savings Bank |
| First Federal Savings and Loan Association of OglesbyOglesby | 1948–1980 | PNC Bank, National Association |
| First Federal Savings and Loan Association of PekinPekin | 1893–2012 | Community Partners Savings Bank |
| First Federal Savings and Loan Association of PeoriaPeoria | 1874–1982 | Bank of America, National Association |
| First Federal Savings and Loan Association of RochelleRochelle | 1974–1981 | Associated Bank, National Association |
| First Federal Savings and Loan Association of SpringfieldSpringfield | 1934–1981 | PNC Bank, National Association |
| First Federal Savings and Loan Association of StreatorStreator | 1892–1986 | PNC Bank, National Association |
| First Federal Savings and Loan Association of TaylorvilleTaylorville | 1909–1988 | JPMorgan Chase Bank, National Association |
| First Federal Savings and Loan Association of TuscolaTuscola | 1883–1990 | Peoples Bank & Trust |
| First Federal Savings and Loan Association of WestchesterWestchester | 1906–1998 | PNC Bank, National Association |
| First Federal Savings Association of TuscolaTuscola | 1990–1991 | Peoples Bank & Trust |
| First Federal Savings BankBelvidere · 2 earlier names | 1922–1998 | First Mid Bank & Trust, National Association |
| First Federal Savings Bank, FSBParis · 1 earlier name | 1903–1990 | First Mid Bank & Trust, National Association |
| First Federal Savings Bank, F.S.B.Rockford · 1 earlier name | 1934–1995 | Associated Bank, National Association |
| First Federal Savings Bank of BarringtonBarrington · 1 earlier name | 1934–1996 | JPMorgan Chase Bank, National Association |
| First Federal Savings Bank of ZionZion | 1991–1991 | BMO Bank National Association |
| First Financial Savings and Loan AssociationDowners Grove | 1893–1978 | Citibank, National Association |
| First Financial Savings and Loan AssociationDowners Grove | 1948–1982 | Citibank, National Association |
| First Granite City Savings and LoanGranite City | 1894–1992 | U.S. Bank National Association |
| First Illinois BankEast St. Louis · 1 earlier name | 1934–2017 | Lindell Bank & Trust Company |
| First Illinois Bank of LaGrangeLa Grange · 2 earlier names | 1899–1989 | JPMorgan Chase Bank, National Association |
| First Illinois Bank of WillowbrookWillowbrook · 2 earlier names | 1975–1989 | JPMorgan Chase Bank, National Association |
| First Illinois National BankSavanna · 1 earlier name | 1933–2001 | Tbk Bank, SSB |
| First Midwest BankChicago · 4 earlier names | 1933–2022 | Old National Bank |
| First Midwest Bank/BraidwoodBraidwood · 1 earlier name | 1948–1986 | Old National Bank |
| First Midwest Bank/Danville, National AssociationDanville · 1 earlier name | 1873–1995 | Old National Bank |
| First Midwest Bank/Deerfield, National AssociationDeerfield · 2 earlier names | 1963–1990 | Old National Bank |
| First Midwest Bank/Hancock County, National AssociationCarthage · 1 earlier name | 1934–1988 | First Bankers Trust Company, National Association |
| First Midwest Bank/Illinois, National AssociationJoliet · 2 earlier names | 1870–1990 | Old National Bank |
| First Midwest Bank/Illinois, National AssociationPlainfield · 2 earlier names | 1913–1995 | Old National Bank |
| First Midwest Bank/Illinois, National AssociationStreator · 2 earlier names | 1882–1988 | Old National Bank |
| First Midwest Bank/Joliet, National AssociationJoliet · 1 earlier name | 1940–1987 | Old National Bank |
| First Midwest Bank/Knox County, National AssociationGalesburg · 1 earlier name | 1862–1988 | Old National Bank |
| First Midwest Bank/Lake CountyMundelein · 1 earlier name | 1965–1988 | Old National Bank |
| First Midwest Bank/Lake Forest, a National AssociationLake Forest · 1 earlier name | 1965–1988 | Old National Bank |
| First Midwest Bank/LakehurstWaukegan · 1 earlier name | 1971–1986 | Old National Bank |
| First Midwest Bank, National AssociationWaukegan · 1 earlier name | 1908–1990 | Old National Bank |
| First Midwest Bank, National AssociationWaukegan · 3 earlier names | 1975–1995 | Old National Bank |
| First Midwest Bank/North Chicago, a National AssociationNorth Chicago · 1 earlier name | 1945–1988 | Old National Bank |
| First Midwest Bank/Quad Cities, National AssociationMoline · 2 earlier names | 1930–1996 | Old National Bank |
| First Midwest Bank/ZionZion · 1 earlier name | 1971–1988 | Old National Bank |
| First Midwest Trust Company, National AssociationSeneca · 3 earlier names | 1945–2001 | Old National Bank |
| First Mutual Bank, S.B.Decatur · 2 earlier names | 1904–1999 | Regions Bank |
| First Mutual SavingsPeoria | 1899–1977 | Associated Bank, National Association |
| First National BankChicago Heights · 1 earlier name | 1929–2007 | Citizens Bank, National Association |
| First National BankMarshall | 1857–2003 | First Financial Bank, National Association |
| First National Bank and Trust Company, Carbondale, IllinoisCarbondale · 1 earlier name | 1893–2000 | Old National Bank |
| First National Bank and Trust Company in Gibson CityGibson City | 1900–1997 | Heartland Bank and Trust Company |
| First National Bank and Trust Company of Oak BrookOak Brook · 1 earlier name | 1971–1986 | Fifth Third Bank, National Association |
| First National Bank-Employee OwnedAntioch · 1 earlier name | 1926–2007 | Heartland Bank and Trust Company |
| First National Bank in GalvaGalva | 1934–1988 | Wells Fargo Bank, National Association |
| First National Bank in GeorgetownGeorgetown | 1891–2017 | Longview Bank |
| First National Bank in GolcondaGolconda | 1934–1994 | Old National Bank |
| First National Bank in HarveyHarvey | 1937–1993 | Fifth Third Bank, National Association |
| First National Bank in HomerHomer | 1920–2005 | Prospect Bank |
| First National Bank in NewtonNewton | 1896–2001 | The Peoples State Bank of Newton, Illinois |
| First National Bank in PaxtonPaxton | 1933–2018 | Frederick Community Bank, The |
| First National Bank of ChillicotheChillicothe · 1 earlier name | 1934–2014 | Better Banks |
| First National Bank of CiceroCicero | 1922–1993 | Fifth Third Bank, National Association |
| First National Bank of ElmhurstElmhurst · 1 earlier name | 1969–2001 | Fifth Third Bank, National Association |
| First National Bank of Evergreen ParkEvergreen Park | 1949–1998 | Fifth Third Bank, National Association |
| First National Bank of FreeportFreeport | 1933–1989 | Fifth Third Bank, National Association |
| First National Bank of IllinoisLansing · 1 earlier name | 1945–2013 | Old Plank Trail Community Bank, National Association |
| First National Bank of IvesdaleIvesdale | 1902–2011 | State Bank of Bement |
| First National Bank of JacksonvilleJacksonville | 1964–1979 | U.S. Bank National Association |
| First National Bank of La GrangeLa Grange | 1934–2014 | FNBC Bank & Trust |
| First National Bank of MacombMacomb | 1966–1986 | MidAmerica National Bank |
| First National Bank of MillstadtMillstadt · 1 earlier name | 1906–2007 | The Central Trust Bank |
| First National Bank of MortonMorton | 1888–1989 | PNC Bank, National Association |
| First National Bank of Morton GroveMorton Grove | 1951–2001 | Fifth Third Bank, National Association |
| First National Bank of Mt. ZionMount Zion | 1975–1991 | Busey Bank |
| First National Bank of NilesNiles · 1 earlier name | 1960–1996 | Fifth Third Bank, National Association |
| First National Bank of NorthbrookNorthbrook | 1968–1997 | Fifth Third Bank, National Association |
| First National Bank of Oak LawnOak Lawn | 1962–1983 | Fifth Third Bank, National Association |
| First National Bank of RossvilleRossville | 1900–1999 | Bank of Rantoul |
| First National Bank of WheelingWheeling | 1978–1996 | Fifth Third Bank, National Association |
| First National Bank of WinnebagoWinnebago | 1963–2001 | Bank First, N.A. |
| First Northwest BankArlington Heights | 1995–2005 | Village Bank and Trust, National Association |
| First Oak Brook Bank/AddisonAddison · 3 earlier names | 1971–1991 | Fifth Third Bank, National Association |
| First Oak Brook Bank/DuPageWarrenville · 1 earlier name | 1928–1988 | Fifth Third Bank, National Association |
| First of America Bank-BelvidereBelvidere · 1 earlier name | 1965–1988 | PNC Bank, National Association |
| First of America Bank-Champaign, National AssociationChampaign · 2 earlier names | 1932–1994 | PNC Bank, National Association |
| First of America Bank-Champion, National AssociationBloomington · 3 earlier names | 1934–1994 | PNC Bank, National Association |
| First of America Bank-Decatur, National AssociationDecatur · 1 earlier name | 1988–1994 | PNC Bank, National Association |
| First of America Bank-DeKalb, National AssociationDe Kalb · 2 earlier names | 1909–1993 | PNC Bank, National Association |
| First of America Bank-Golf MillNiles · 1 earlier name | 1961–1991 | PNC Bank, National Association |
| First of America Bank - Grayslake, National AssociationGrayslake · 1 earlier name | 1941–1989 | PNC Bank, National Association |
| First of America Bank-Illinois, National AssociationBannockburn · 3 earlier names | 1945–1998 | PNC Bank, National Association |
| First of America Bank-Illinois, National AssociationPeoria · 2 earlier names | 1954–1994 | PNC Bank, National Association |
| First of America Bank-Kankakee, National AssociationKankakee · 1 earlier name | 1890–1990 | PNC Bank, National Association |
| First of America Bank-Metro Southwest, National AssociationKankakee · 4 earlier names | 1871–1994 | PNC Bank, National Association |
| First of America Bank-Mundelein, National AssociationMundelein · 1 earlier name | 1937–1989 | PNC Bank, National Association |
| First of America Bank-OttawaOttawa · 1 earlier name | 1974–1990 | PNC Bank, National Association |
| First of America Bank-Quad Cities, National AssociationRock Island · 2 earlier names | 1852–1990 | PNC Bank, National Association |
| First of America Bank-Quad Cities, National AssociationRock Island · 2 earlier names | 1966–1994 | PNC Bank, National Association |
| First of America Bank-Rockford, National AssociationRockford · 1 earlier name | 1945–1990 | PNC Bank, National Association |
| First of America Bank - Springfield, National AssociationSpringfield · 1 earlier name | 1886–1994 | PNC Bank, National Association |
| First of America Bank - Vernon HillsVernon Hills · 2 earlier names | 1975–1988 | PNC Bank, National Association |
| First of America Bank - ZionZion · 1 earlier name | 1909–1990 | PNC Bank, National Association |
| First of America-North Central Illinois, National AssociationRockford · 2 earlier names | 1945–1994 | PNC Bank, National Association |
| First Personal BankOrland Park | 1999–2018 | Peoples Bank |
| First Ridge Farm State BankRidge Farm · 1 earlier name | 1945–2003 | First Financial Bank, National Association |
| First Savanna Savings BankSavanna · 1 earlier name | 1886–2023 | Citizens State Bank |
| First Savings and Loan AssociationLombard | 1923–1975 | The Huntington National Bank |
| First Savings and Loan AssociationWoodstock | 1958–1976 | JPMorgan Chase Bank, National Association |
| First Savings and Loan Association of South HollandSouth Holland | 1959–2001 | Fifth Third Bank, National Association |
| First Savings and Loan Association of SycamoreGenoa | 1919–1983 | JPMorgan Chase Bank, National Association |
| First Savings and Loan Association of Will CountyLockport | 1886–1982 | PNC Bank, National Association |
| First Savings and Loan Association of WilmingtonWilmington | 1959–1979 | Old National Bank |
| First Savings BankDanville · 1 earlier name | 1880–2023 | The Hometown Savings Bank |
| First Savings Bank of ZionZion · 2 earlier names | 1947–1991 | BMO Bank National Association |
| First Savings of AmericaOrland Park · 1 earlier name | 1887–1986 | Citizens Bank, National Association |
| First Savings of America, A Federal Savings and Loan AssociationOrland Park | 1986–1989 | Citizens Bank, National Association |
| First Savings of La Grange ParkLa Grange Park | 1904–1977 | PNC Bank, National Association |
| First Security BankSandwich | 1975–1984 | Midland States Bank |
| First Security Bank of Cary-GroveCary | 1971–1997 | Fifth Third Bank, National Association |
| First Security Trust and Savings BankElmwood Park | 1946–2025 | Byline Bank |
| First Southern BankCarbondale · 4 earlier names | 1905–2014 | First Southern Bank |
| First Springfield Bank & TrustSpringfield · 2 earlier names | 1890–1997 | Prairie State Bank and Trust |
| First State BankAtwood · 1 earlier name | 1919–2004 | First State Bank and Trust |
| First State BankNew Berlin | 1903–1989 | Warren-Boynton State Bank |
| First State Bank and Trust CompanyRockford · 2 earlier names | 1964–1995 | U.S. Bank National Association |
| First State Bank of AlsipAlsip | 1976–1992 | Old National Bank |
| First State Bank of Beardstown, IllinoisBeardstown | 1889–2009 | West Central Bank |
| First State Bank of BiggsvilleBiggsville | 1927–2009 | Casey State Bank |
| First State Bank of BloomingtonBloomington · 1 earlier name | 1975–2023 | First State Bank and Trust |
| First State Bank of Calumet CityCalumet City | 1958–1996 | Fifth Third Bank, National Association |
| First State Bank of ChicagoChicago | 1970–1996 | Parkway Bank and Trust Company |
| First State Bank of DixDix | 1909–2011 | Community First Bank of the Heartland |
| First State Bank of GurneeGurnee | 1994–1994 | PNC Bank, National Association |
| First State Bank of HeyworthHeyworth · 2 earlier names | 1906–2003 | First State Bank and Trust |
| First State Bank of Maple ParkMaple Park | 1903–1997 | Old Second National Bank |
| First State Bank of NewmanNewman | 1912–2002 | First Neighbor Bank, National Association |
| First State Bank of PatokaPatoka | 1913–1994 | The FNB Community Bank |
| First State Bank of PekinPekin | 1971–2001 | Heartland Bank and Trust Company |
| First State Bank of Red BudRed Bud | 1875–2012 | Dieterich Bank |
| First State Bank of Round LakeRound Lake | 1949–2005 | Old National Bank |
| First State Bank of West SalemWest Salem | 1942–2016 | The First National Bank of Allendale |
| First State Bank of WyanetWyanet · 1 earlier name | 1908–1988 | BMO Bank National Association |
| First State Bank & Trust Company of Franklin ParkFranklin Park | 1969–1987 | Bank of America, National Association |
| First State Bank & Trust Company of Park RidgePark Ridge | 1967–1994 | PNC Bank, National Association |
| First Suburban National BankMaywood · 1 earlier name | 1943–2010 | State Bank of Texas |
| First Trust and Savings Bank of BradleyBradley · 1 earlier name | 1983–1988 | PNC Bank, National Association |
| First Trust and Savings Bank of TaylorvilleTaylorville | 1930–1998 | U.S. Bank National Association |
| First Trust Bank of ShelbyvilleShelbyville · 1 earlier name | 1909–2002 | Busey Bank |
| First Trust & Savings Bank of Albany, IllinoisAlbany | 1902–2019 | Morton Community Bank |
| First United BankCrete · 2 earlier names | 1972–2012 | Old Plank Trail Community Bank, National Association |
| Flora Savings BankFlora · 1 earlier name | 1904–2018 | Community Partners Savings Bank |
| Founders BankWorth · 2 earlier names | 1961–2009 | CIBC Bank USA |
| Foxdale BankSouth Elgin | 1995–2001 | FNBC Bank & Trust |
| Fox Lake State BankFox Lake | 1955–1995 | U.S. Bank National Association |
| Fox Valley BankSt. Charles | 1989–1998 | Fifth Third Bank, National Association |
| Fox Valley Savings and Loan AssociationSandwich | 1974–1982 | no successor |
| Franklin BankFranklin | 1934–2015 | Community State Bank |
| Franklin Grove BankFranklin Grove | 1880–2016 | The First National Bank in Amboy |
| Franklin Savings AssociationChicago | 1884–1981 | Fifth Third Bank, National Association |
| Freedom BankSterling · 1 earlier name | 1891–2014 | UMB Bank, National Association |
| Freedom Federal Savings BankBerwyn · 1 earlier name | 1927–1988 | no successor |
| Freestar Bank, National AssociationPontiac · 1 earlier name | 1934–2011 | First Financial Bank, National Association |
| Frontier Federal Savings BankBelleville | 1990–1990 | First Bank |
| Frontier FinancialBelleville · 1 earlier name | 1904–1990 | First Bank |
| FSFSB, National AssociationChicago · 1 earlier name | 1926–2004 | Fifth Third Bank, National Association |
| Galatia Community State BankGalatia | 1972–1995 | MidCountry Bank |
| Galena State Bank & Trust Co.Galena · 1 earlier name | 1967–2015 | UMB Bank, National Association |
| Galva Federal Savings and Loan AssociationGalva | 1882–1988 | First Bank |
| Gary-Wheaton Bank, National AssociationWheaton · 1 earlier name | 1874–1993 | JPMorgan Chase Bank, National Association |
| Gary-Wheaton Bank of Batavia, National AssociationBatavia · 2 earlier names | 1909–1993 | JPMorgan Chase Bank, National Association |
| Gary-Wheaton Bank of Downers Grove, National AssociationDowners Grove · 2 earlier names | 1974–1993 | JPMorgan Chase Bank, National Association |
| Gary-Wheaton Bank of Fox Valley, National AssociationRomeoville · 2 earlier names | 1976–1993 | JPMorgan Chase Bank, National Association |
| Gateway Community BankRoscoe | 2002–2019 | CBI Bank & Trust |
| Gateway National Bank of ChicagoChicago | 1957–1979 | Providence Bank & Trust |
| Gem City Federal Savings and Loan AssociationQuincy | 1990–1990 | First Bank |
| Gem City Savings and Loan AssociationQuincy | 1889–1990 | First Bank |
| Geneva Savings and Loan AssociationGeneva | 1907–1981 | U.S. Bank National Association |
| George Washington Savings BankOrland Park · 1 earlier name | 1890–2010 | The Huntington National Bank |
| Germaniabank, A FSBAlton · 2 earlier names | 1890–1991 | U.S. Bank National Association |
| Gibson Federal Savings and Loan AssociationGibson City | 1905–1980 | PNC Bank, National Association |
| Gibson Federal Savings and Loan AssociationGibson City | 1894–1988 | PNC Bank, National Association |
| Glasford State BankGlasford | 1932–2022 | Better Banks |
| Glen Ellyn Savings and Loan Association, A Federal Savings and Loan AssoGlen Ellyn · 1 earlier name | 1957–1986 | Citibank, National Association |
| Glen Ellyn Savings and Loan Association, A Federal Savings and Loan AssoGlen Ellyn | 1985–1988 | Citibank, National Association |
| Glenview State BankGlenview | 1920–2021 | Busey Bank |
| Godfrey State BankGodfrey | 1960–1993 | U.S. Bank National Association |
| Gold Coast BankChicago | 2007–2026 | no successor |
| Golden Eagle Community BankWoodstock | 2007–2019 | no successor |
| Golden State BankGolden | 1910–2006 | United Community Bank |
| Grand National BankSouth Chicago Heights · 2 earlier names | 1916–1996 | Fifth Third Bank, National Association |
| Grand National BankWauconda · 1 earlier name | 1961–2000 | Fifth Third Bank, National Association |
| Grand National BankWaukegan · 1 earlier name | 1972–1996 | Fifth Third Bank, National Association |
| Great American Federal Savings and Loan AssociationOak Park | 1934–1990 | JPMorgan Chase Bank, National Association |
| Great American Savings and Loan Association, F.A.Oak Park | 1990–1990 | JPMorgan Chase Bank, National Association |
| GreatBankAlgonquin | 1995–2007 | Citizens Bank, National Association |
| Greatbank ChicagoSkokie · 2 earlier names | 1914–2007 | Citizens Bank, National Association |
| Greater Chicago BankBellwood · 1 earlier name | 1961–2006 | Providence Bank & Trust |
| Great Lakes Bank, National AssociationBlue Island · 1 earlier name | 1896–2014 | Old National Bank |
| Great Northern Savings BankMundelein · 2 earlier names | 1960–1988 | Bank of America, National Association |
| GreenChoice Bank, fsbChicago · 1 earlier name | 1910–2014 | Providence Bank & Trust |
| Grunwald Savings and Loan AssociationChicago | 1913–1982 | JPMorgan Chase Bank, National Association |
| Guaranty Bank & Trust CompanyChicago | 1946–1979 | Providence Bank & Trust |
| Guaranty Federal Savings and Loan AssociationGlenview | 1956–1982 | JPMorgan Chase Bank, National Association |
| Guaranty Savings and Loan AssociationChicago | 1899–1980 | JPMorgan Chase Bank, National Association |
| Guardian Savings BankGranite City · 2 earlier names | 1919–2024 | Community Partners Savings Bank |
| Hamel State BankHamel | 1957–2002 | Associated Bank, National Association |
| Hancock Savings and Loan AssociationCarthage | 1965–1992 | UMB Bank, National Association |
| Hanna City State BankHanna City | 1964–1994 | Morton Community Bank |
| Hardin County State BankCave In Rock | 1903–1988 | Banterra Bank |
| Hardware State BankLovington | 1885–2017 | First Community Bank of Moultrie County |
| Harris Bank ArgoSummit · 1 earlier name | 1910–2005 | BMO Bank National Association |
| Harris Bank Arlington-MeadowsRolling Meadows · 2 earlier names | 1959–2005 | BMO Bank National Association |
| Harris Bank Aurora, National AssociationAurora · 2 earlier names | 1961–2005 | BMO Bank National Association |
| Harris Bank Barrington, National AssociationBarrington · 1 earlier name | 1919–2005 | BMO Bank National Association |
| Harris Bank BartlettBartlett · 3 earlier names | 1910–2005 | BMO Bank National Association |
| Harris Bank Batavia, National AssociationBatavia · 1 earlier name | 1891–2005 | BMO Bank National Association |
| Harris Bank Cary-GroveCary · 2 earlier names | 1914–2005 | BMO Bank National Association |
| Harris Bank Elk Grove, National AssociationElk Grove Village · 1 earlier name | 1971–2005 | BMO Bank National Association |
| Harris Bank FrankfortFrankfort · 1 earlier name | 1913–2005 | BMO Bank National Association |
| Harris Bank Hinsdale, National AssociationHinsdale · 1 earlier name | 1922–2005 | BMO Bank National Association |
| Harris Bank Hoffman-SchaumburgHoffman Estates · 3 earlier names | 1969–2005 | BMO Bank National Association |
| Harris Bank HuntleyHuntley · 1 earlier name | 1913–2005 | BMO Bank National Association |
| Harris Bank Joliet, National AssociationJoliet · 1 earlier name | 1857–2005 | BMO Bank National Association |
| Harris Bank LibertyvilleLibertyville | 1990–2005 | BMO Bank National Association |
| Harris Bank MarengoMarengo · 1 earlier name | 1930–2005 | BMO Bank National Association |
| Harris Bank NapervilleNaperville · 1 earlier name | 1957–2005 | BMO Bank National Association |
| Harris Bank Oakbrook TerraceOakbrook Terrace · 3 earlier names | 1972–2005 | BMO Bank National Association |
| Harris Bank Palatine, National AssociationPalatine · 2 earlier names | 1944–2005 | BMO Bank National Association |
| Harris Bank Round LakeRound Lake Heights · 1 earlier name | 1991–2004 | BMO Bank National Association |
| Harris Bank St. CharlesSaint Charles · 1 earlier name | 1931–2005 | BMO Bank National Association |
| Harris Bank WestchesterWestchester · 3 earlier names | 1964–2005 | BMO Bank National Association |
| Harris Bank West, National AssociationRoselle · 2 earlier names | 1934–2005 | BMO Bank National Association |
| Harris Bank Wilmette, National AssociationWilmette · 1 earlier name | 1973–2005 | BMO Bank National Association |
| Harris Bank Winnetka, National AssociationWinnetka · 1 earlier name | 1909–2005 | BMO Bank National Association |
| Harris Bank WoodstockWoodstock · 1 earlier name | 1889–2005 | BMO Bank National Association |
| Harris Trust and Savings BankChicago | 1882–2005 | BMO Bank National Association |
| Hartford Plaza BankChicago | 1963–1980 | Bank of America, National Association |
| Harvard Savings BankHarvard · 1 earlier name | 1934–2016 | First Secure State Bank |
| Havana Savings and Loan AssociationHavana | 1882–1974 | Associated Bank, National Association |
| Hawthorn BankMundelein | 1992–2003 | Associated Bank, National Association |
| Hawthorne Federal Savings and Loan AssociationNaperville · 1 earlier name | 1920–1984 | Fifth Third Bank, National Association |
| Heartland National BankHerrin · 1 earlier name | 1949–1999 | Banterra Bank |
| Heartland Savings BankMattoon · 2 earlier names | 1883–1997 | First Mid Bank & Trust, National Association |
| Heart of Illinois Bank, F.S.B.Spring Valley · 1 earlier name | 1961–1994 | Heartland Bank and Trust Company |
| Hebron State BankHebron | 1920–2001 | The Harvard State Bank |
| Hemlock Federal Bank for SavingsOak Forest · 1 earlier name | 1904–2006 | Marquette Bank |
| Henry State BankHenry | 1903–2017 | MidAmerica National Bank |
| Herget Bank, National AssociationPekin · 1 earlier name | 1905–2015 | Busey Bank |
| Heritage BankBlue Island · 4 earlier names | 1912–1998 | Old National Bank |
| Heritage BankFrankfort · 2 earlier names | 1958–2008 | Old Second National Bank |
| Heritage Bank AlsipAlsip · 2 earlier names | 1968–1993 | Old National Bank |
| Heritage Bank and Trust CompanyBlue Island · 2 earlier names | 1930–1991 | Old National Bank |
| Heritage Bank and Trust CompanyCrest Hill · 1 earlier name | 1971–1986 | JPMorgan Chase Bank, National Association |
| Heritage Bank Country Club HillsCountry Club Hills · 2 earlier names | 1971–1992 | Old National Bank |
| Heritage Bank CrestwoodCrestwood · 2 earlier names | 1979–1991 | Old National Bank |
| Heritage Bank MidlothianMidlothian · 1 earlier name | 1960–1994 | Old National Bank |
| Heritage Bank, National AssociationMonee · 3 earlier names | 1907–1999 | Old National Bank |
| Heritage Bank of Bureau CountyDepue · 1 earlier name | 1904–1984 | Heartland Bank and Trust Company |
| Heritage Bank of Central IllinoisTrivoli · 1 earlier name | 1920–2016 | Morton Community Bank |
| Heritage Bank of Oak LawnOak Lawn | 1973–1991 | Old National Bank |
| Heritage Community BankGlenwood · 2 earlier names | 1969–2009 | Fifth Third Bank, National Association |
| Heritage Federal Savings and Loan AssociationSparta | 1886–1990 | Chester National Bank |
| Heritage Savings and LoanJerseyville | 1887–1989 | Carrollton Bank |
| Heritage Savings and Loan Association, F.A.Jerseyville | 1989–1990 | Carrollton Bank |
| Heritage State BankLawrenceville · 2 earlier names | 1899–2020 | The First National Bank of Carmi |
| Herrin Security BankHerrin | 1957–2014 | First Southern Bank |
| H. F. Gehant Banking Co.West Brooklyn | 1897–2020 | First State Bank |
| Highland Community BankChicago | 1970–2015 | United Fidelity Bank, fsb |
| Highland Park Federal Savings and Loan AssociationHighland Park | 1888–1977 | Bank of America, National Association |
| Hinckley State BankHinckley | 1904–1998 | Fifth Third Bank, National Association |
| Homebanc, A Federal Savings BankRockford · 1 earlier name | 1889–1998 | U.S. Bank National Association |
| Home Federal SavingsAlton · 1 earlier name | 1902–1990 | U.S. Bank National Association |
| Home Federal Savings and Loan Association of CentraliaCentralia | 1891–1990 | Regions Bank |
| Home Federal Savings and Loan Association of ChicagoChicago | 1886–1980 | Bank of America, National Association |
| Home Federal Savings and Loan Association of ElginElgin | 1883–2000 | Associated Bank, National Association |
| Home Federal Savings and Loan Association of JolietJoliet | 1957–1989 | Old National Bank |
| Home Federal Savings and Loan Association of Lake CountyWaukegan | 1959–1990 | PNC Bank, National Association |
| Home Federal Savings and Loan Association of PeoriaPeoria | 1926–1988 | First Bank |
| Home Federal Savings BankCarbondale · 1 earlier name | 1905–1997 | Regions Bank |
| Home Federal Savings Bank, F.A.Waukegan | 1990–1991 | PNC Bank, National Association |
| Home Guaranty Bank, s.b.Piper City · 1 earlier name | 1956–1999 | First Financial Bank, National Association |
| Home Savings, A Federal Savings and Loan AssociationJoliet | 1989–1990 | Old National Bank |
| Home Savings and Loan AssociationWaukegan | 1956–1977 | PNC Bank, National Association |
| Home Savings and Loan Association of Aurora, A Federal AssociationAurora · 1 earlier name | 1882–1985 | PNC Bank, National Association |
| HomeStar Bank and Financial ServicesManteno · 3 earlier names | 1946–2019 | Midland States Bank |
| Hometown Federal Savings AssociationWinfield | 1990–1991 | Popular Bank |
| Hometown Savings and Loan Association, FAWinfield · 1 earlier name | 1890–1990 | Popular Bank |
| Homewood Federal Savings and Loan AssociationHomewood | 1920–1991 | Citizens Bank, National Association |
| Horizon Federal Savings BankWilmette | 1934–1990 | JPMorgan Chase Bank, National Association |
| Horizon Savings Bank, F.S.B.Wilmette | 1990–1991 | JPMorgan Chase Bank, National Association |
| Household Bank, FSBWood Dale | 1957–2003 | no successor |
| Household Bank (Illinois), N.A.Prospect Heights · 1 earlier name | 1990–1998 | no successor |
| Howard Savings BankGlenview · 1 earlier name | 1955–2004 | no successor |
| Hoyleton State and Savings BankHoyleton | 1906–1988 | Regions Bank |
| Hoyne Interim BankChicago · 1 earlier name | 1929–2020 | Hoyne Savings Bank |
| Huntington Federal Savings Bank of IllinoisChicago | 1993–1995 | Marquette Bank |
| Hyde Park Bank and Trust CompanyChicago | 1928–2012 | Beverly Bank & Trust Company, National Association |
| Hyde Park Federal Savings and Loan Association of ChicagoChicago | 1961–1982 | JPMorgan Chase Bank, National Association |
| Illini BankSpringfield · 3 earlier names | 1969–2017 | United Community Bank |
| Illini Bank-EastCoffeen · 3 earlier names | 1984–1993 | United Community Bank |
| Illini Bank-ElkhartElkhart · 1 earlier name | 1972–1992 | United Community Bank |
| Illini Bank - NorthDanvers · 3 earlier names | 1983–1993 | United Community Bank |
| Illini Bank of Menard CountyPetersburg · 2 earlier names | 1965–1993 | United Community Bank |
| Illini Bank-StoningtonStonington · 2 earlier names | 1975–1992 | United Community Bank |
| Illini Federal Savings and Loan AssociationFairview Heights | 1894–1990 | Associated Bank, National Association |
| Illinois Bank & TrustRockford · 1 earlier name | 1995–2022 | UMB Bank, National Association |
| Illinois Community BankEffingham · 2 earlier names | 1893–2005 | Midland States Bank |
| Illinois One Bank, National AssociationShawneetown · 1 earlier name | 1934–2000 | Old National Bank |
| Illinois Savings Bank, FAPeoria · 2 earlier names | 1917–1990 | Heartland Bank and Trust Company |
| Illinois State BankLake In The Hills · 1 earlier name | 1996–2005 | North Shore Bank |
| InBankOak Forest · 2 earlier names | 1970–2009 | Fifth Third Bank, National Association |
| Independence Bank of ChicagoChicago | 1964–1996 | Providence Bank & Trust |
| Independent Bankers' BankSpringfield · 1 earlier name | 1986–2009 | TIB National Association |
| Independent Bankers' Bank Bridge Bank, National AssociationSpringfield | 2009–2010 | TIB National Association |
| Ingraham State BankIngraham | 1921–1996 | First National Bank in Olney |
| Inland Bank and TrustHillside · 1 earlier name | 1987–2008 | Byline Bank |
| Inland Bank & TrustOak Brook · 3 earlier names | 1977–2023 | Byline Bank |
| Inter-State Savings AssociationChicago | 1907–1976 | Citibank, National Association |
| Investors Savings and Loan AssociationFairview Heights | 1920–1982 | First Bank |
| Iroquois Federal Savings and Loan AssociationWatseka | 1883–2026 | Servbank, National Association |
| Irving Federal Bank For SavingsChicago · 1 earlier name | 1913–1992 | U.S. Bank National Association |
| Irving Federal Bank for Savings, F.S.B.Chicago | 1992–1994 | U.S. Bank National Association |
| ISBT, National AssociationEast Alton · 2 earlier names | 1904–1996 | Regions Bank |
| Jacksonville Savings BankJacksonville · 1 earlier name | 1917–2019 | Heartland Bank and Trust Company |
| Jefferson State BankChicago | 1955–1997 | Parkway Bank and Trust Company |
| Johnson Bank IllinoisLake Forest · 1 earlier name | 1991–2000 | CIBC Bank USA |
| Kaneland Community BankElburn | 2001–2002 | American Bank and Trust Company, National Association |
| Kansas State BankKansas | 1943–1998 | Prospect Bank |
| Kempton State BankKempton · 2 earlier names | 1946–1992 | Vermilion Valley Bank |
| Kenney Bank and TrustKenney · 1 earlier name | 1978–2015 | no successor |
| Kent BankKent · 1 earlier name | 1923–2014 | Solutions Bank |
| Kewanee National BankKewanee | 1954–1993 | PNC Bank, National Association |
| KFS Bank, F.S.B.Kankakee · 2 earlier names | 1885–2003 | Midland States Bank |
| Kinderhook State BankKinderhook | 1919–2013 | Central State Bank |
| King City Federal Savings BankMount Vernon · 1 earlier name | 1914–1995 | Fifth Third Bank, National Association |
| Korea Exchange BankChicago | 1967–2004 | Bank of Hope |
| Korea First BankChicago | 1929–1999 | no successor |
| La Grange Federal Savings and Loan AssociationLa Grange | 1925–1994 | PNC Bank, National Association |
| Lake Forest National BankLake Forest | 1971–1988 | The Northern Trust Company |
| Lake Forest Savings and Loan AssociationLake Forest | 1955–1983 | Fifth Third Bank, National Association |
| Lake Shore National BankChicago | 1920–1994 | JPMorgan Chase Bank, National Association |
| Landmark Bank of AltonAlton · 2 earlier names | 1971–1990 | Regions Bank |
| Landmark Bank of EdgemontEast Saint Louis · 2 earlier names | 1959–1988 | Regions Bank |
| Landmark Bank of Madison CountyGlen Carbon · 2 earlier names | 1975–1990 | Regions Bank |
| Landmark Bank of MascoutahMascoutah · 3 earlier names | 1923–1988 | Regions Bank |
| Landmark Bank of St. Clair CountyO'Fallon · 3 earlier names | 1906–1988 | Regions Bank |
| Land of Lincoln BankSpringfield | 1959–1988 | U.S. Bank National Association |
| Land of Lincoln Savings and LoanBerwyn | 1916–1980 | no successor |
| Land of Lincoln Savings and Loan AssociationBerwyn | 1925–1989 | no successor |
| Lansing Federal Savings and Loan AssociationLansing | 1927–1984 | First Savings Bank of Hegewisch |
| LaSalle BankWestmont · 2 earlier names | 1960–1997 | Bank of America, National Association |
| LaSalle Bank, F.S.B.Chicago · 2 earlier names | 1922–2000 | Bank of America, National Association |
| Lasalle Bank IllinoisFranklin Park · 3 earlier names | 1916–1997 | Bank of America, National Association |
| LaSalle Bank MattesonMatteson · 3 earlier names | 1966–1995 | Bank of America, National Association |
| LaSalle Bank National AssociationChicago · 3 earlier names | 1936–2008 | Bank of America, National Association |
| LaSalle Bank National AssociationChicago · 2 earlier names | 1941–1999 | Bank of America, National Association |
| LaSalle Bank NIChicago · 2 earlier names | 1905–1998 | Bank of America, National Association |
| LaSalle Bank NorthbrookNorthbrook · 1 earlier name | 1946–1995 | Bank of America, National Association |
| La Salle Bank WestmontWestmont · 1 earlier name | 1963–1995 | Bank of America, National Association |
| LaSalle Cragin Bank, FSBChicago · 2 earlier names | 1909–1995 | Bank of America, National Association |
| LaSalle National BankChicago | 1927–1990 | Bank of America, National Association |
| Laura State BankWilliamsfield | 1904–2018 | Bank of Farmington |
| Lemont Federal Savings AssociationLemont | 1992–1994 | Fifth Third Bank, National Association |
| Lemont Savings AssociationLemont | 1957–1992 | Fifth Third Bank, National Association |
| Lena State BankLena | 1867–2025 | Foresight Bank |
| Le Roy Savings and Loan AssociationLe Roy | 1916–1983 | Busey Bank |
| Lewistown Savings and Loan AssociationLewistown | 1895–1976 | Associated Bank, National Association |
| Lexington BankLexington · 1 earlier name | 1910–1993 | Commerce Bank |
| Liberty BankAlton | 1994–2018 | United Community Bank |
| Liberty Federal BankHinsdale · 2 earlier names | 1934–2001 | Citizens Bank, National Association |
| Liberty Federal Savings BankChicago · 1 earlier name | 1887–1997 | Citizens Bank, National Association |
| Libertyville Federal Savings and Loan AssociationLibertyville | 1927–1990 | BMO Bank National Association |
| Life Savings and Loan Association of AmericaMelrose Park | 1926–1982 | no successor |
| Life Savings of America, A FSBRockford · 1 earlier name | 1959–1987 | no successor |
| Lincoln-Douglas Savings and Loan AssociationJacksonville | 1961–1983 | First Bank |
| Lincoln National BankChicago | 1944–1996 | Fifth Third Bank, National Association |
| Lincoln Park Savings BankChicago · 1 earlier name | 1946–2010 | Northbrook Bank and Trust Company, National Association |
| Lincoln Square Savings and Loan AssociationChicago | 1958–1982 | JPMorgan Chase Bank, National Association |
| Lincoln State Bank, S.B.Rochelle | 1999–2013 | First State Bank |
| LincolnWay Community BankNew Lenox | 2005–2023 | no successor |
| Lincolnway State BankSterling | 1973–1989 | Fifth Third Bank, National Association |
| Litchfield Community Savings, S.B.Litchfield · 1 earlier name | 1889–1997 | Heartland Bank and Trust Company |
| LNB National BankDekalb · 1 earlier name | 1945–2004 | Old National Bank |
| Logan County BankLincoln | 1962–2013 | Heartland Bank and Trust Company |
| Longview Bank and TrustChrisman · 1 earlier name | 1891–2023 | Longview Bank |
| Loves Park FSBLoves Park · 1 earlier name | 1961–1988 | U.S. Bank National Association |
| Lyons Federal Trust and Savings BankCountryside · 1 earlier name | 1922–1987 | no successor |
| Lyons Savings, A Federal Savings and Loan AssociationCountryside · 1 earlier name | 1987–1988 | no successor |
| Mackinaw Federal Savings and Loan AssociationMackinaw | 1911–1982 | Heartland Bank and Trust Company |
| Macktown State BankRockton | 1958–2001 | Bank First, N.A. |
| Madison Bank and Trust CompanyChicago | 1955–1995 | Fifth Third Bank, National Association |
| Madison Bank, National AssociationChicago · 1 earlier name | 1976–1996 | Fifth Third Bank, National Association |
| Madison County Federal Savings and Loan AssociationGranite City | 1923–1990 | First Bank |
| Madison Park BankPeoria | 1964–1990 | Wells Fargo Bank, National Association |
| Magna Bank of BellevilleBelleville · 1 earlier name | 1962–1990 | Regions Bank |
| Magna Bank of CarbondaleCarbondale · 3 earlier names | 1905–1992 | Regions Bank |
| Magna Bank of Central Illinois, National AssociationDecatur · 2 earlier names | 1860–1993 | Regions Bank |
| Magna Bank of FreeburgFreeburg · 2 earlier names | 1905–1989 | Regions Bank |
| Magna Bank of GorevilleGoreville · 1 earlier name | 1963–1995 | Regions Bank |
| Magna Bank of IllinoisFairview Heights · 4 earlier names | 1965–1992 | Regions Bank |
| Magna Bank of LincolnLincoln · 2 earlier names | 1934–1989 | Regions Bank |
| Magna Bank of Madison CountyGranite City · 3 earlier names | 1902–1993 | Regions Bank |
| Magna Bank of MarissaMarissa · 2 earlier names | 1933–1989 | Regions Bank |
| Magna Bank of MascoutahMascoutah · 3 earlier names | 1892–1989 | Regions Bank |
| Magna Bank of McLean CountyBloomington · 1 earlier name | 1903–1991 | Regions Bank |
| Magna Bank of New HollandNew Holland · 1 earlier name | 1946–1989 | Regions Bank |
| Magna Bank of Randolph CountySparta · 3 earlier names | 1910–1992 | Regions Bank |
| Magna Bank of SesserSesser · 1 earlier name | 1945–1991 | Regions Bank |
| Magna Bank of Southern IllinoisCentralia · 2 earlier names | 1921–1993 | Regions Bank |
| Magna Bank of SpringfieldSpringfield · 1 earlier name | 1955–1991 | Regions Bank |
| Magna Bank of St. Clair County, National AssociationBelleville · 2 earlier names | 1874–1993 | Regions Bank |
| Magna Bank of Washington CountyNashville · 4 earlier names | 1874–1992 | Regions Bank |
| Magna Bank of Wood River, National AssociationWood River · 1 earlier name | 1920–1990 | Regions Bank |
| Magna State BankHighland · 4 earlier names | 1908–1992 | Regions Bank |
| MainSource Bank of IllinoisKankakee · 3 earlier names | 1962–2009 | First Financial Bank |
| Main Street Bank & TrustChampaign · 2 earlier names | 1861–2007 | Busey Bank |
| Malden State BankMalden · 1 earlier name | 1910–2004 | First State Bank of Van Orin |
| Manning Savings and Loan AssociationChicago | 1904–1983 | no successor |
| Manor Federal Savings and Loan AssociationCicero | 1929–1981 | Citizens Bank, National Association |
| Manufacturers BankChicago · 1 earlier name | 1934–1997 | Fifth Third Bank, National Association |
| Manufacturers BankChicago · 3 earlier names | 1945–2001 | Fifth Third Bank, National Association |
| Marine American National BankChampaign · 1 earlier name | 1964–1988 | JPMorgan Chase Bank, National Association |
| Marine BankSpringfield · 3 earlier names | 1970–2023 | Morton Community Bank |
| Marine Bank and TrustCarthage · 1 earlier name | 1920–2016 | United Community Bank |
| Mark Twain Edwardsville BankEdwardsville · 1 earlier name | 1917–1988 | U.S. Bank National Association |
| Mark Twain Illinois BankBelleville · 2 earlier names | 1969–1997 | U.S. Bank National Association |
| Maroa Forsyth Community BankMaroa · 1 earlier name | 1951–2011 | Scott State Bank |
| Marquette Bank MonmouthMonmouth · 1 earlier name | 1905–2002 | Wells Fargo Bank, National Association |
| Marquette Bank MorrisonMorrison · 1 earlier name | 1878–2002 | Wells Fargo Bank, National Association |
| Marshall County State BankVarna | 1883–2014 | no successor |
| Martinsville State BankMartinsville | 1891–1988 | Regions Bank |
| Mattoon BankMattoon | 1972–1989 | First Mid Bank & Trust, National Association |
| Mayfair BankChicago | 1987–1992 | Bank of Hope |
| Mazon State BankMazon | 1944–2016 | Busey Bank |
| MB Financial Bank, National AssociationChicago · 1 earlier name | 1933–2019 | Fifth Third Bank, National Association |
| McHenry Savings BankMchenry · 1 earlier name | 1955–2024 | no successor |
| McHenry State BankMchenry | 1906–1998 | Old National Bank |
| Mechanicsburg Citizens Bank & Trust CompanyMechanicsburg · 1 earlier name | 1981–1988 | United Community Bank |
| Melrose SavingsMelrose Park | 1889–1982 | Bank of America, National Association |
| Melvin State BankMelvin | 1890–1991 | Merchants Bank of Indiana |
| Mendon State BankMendon | 1914–1986 | First Bankers Trust Company, National Association |
| Mendota Savings and Loan AssociationMendota | 1926–1989 | Eureka Savings Bank |
| Mercantile BankGalena · 3 earlier names | 1916–1997 | U.S. Bank National Association |
| Mercantile BankQuincy · 1 earlier name | 1906–2019 | United Community Bank |
| Mercantile Bank National AssociationHartford · 5 earlier names | 1890–1997 | U.S. Bank National Association |
| Mercantile Bank National AssociationHartford · 2 earlier names | 1959–1997 | U.S. Bank National Association |
| Mercantile Bank of CarlyleCarlyle · 1 earlier name | 1904–1996 | U.S. Bank National Association |
| Mercantile Bank of CentraliaCentralia · 2 earlier names | 1865–1996 | U.S. Bank National Association |
| Mercantile Bank of FloraFlora · 2 earlier names | 1872–1996 | U.S. Bank National Association |
| Mercantile Bank of IllinoisAlton · 2 earlier names | 1902–1997 | U.S. Bank National Association |
| Mercantile Bank of IllinoisSpringfield · 4 earlier names | 1934–2000 | U.S. Bank National Association |
| Mercantile Bank of Illinois National AssociationHartford · 2 earlier names | 1836–1997 | U.S. Bank National Association |
| Mercantile Bank of Northern IllinoisFreeport · 2 earlier names | 1942–1998 | U.S. Bank National Association |
| Mercantile Bank of Sterling-Rock Falls National AssociationSterling · 2 earlier names | 1934–1997 | U.S. Bank National Association |
| Mercantile National Bank of ChicagoChicago | 1912–1979 | JPMorgan Chase Bank, National Association |
| Merchandise National Bank of ChicagoChicago | 1930–1994 | Fifth Third Bank, National Association |
| Merchants and Manufacturers BankJoliet · 3 earlier names | 1969–2024 | Busey Bank |
| Meridian BankEldred · 1 earlier name | 1910–2008 | Constitution Bank, National Association |
| MetrobankBerwyn · 4 earlier names | 1947–2013 | Byline Bank |
| Metrobank - Illinois, National AssociationEast Moline | 1997–1997 | Tbk Bank, SSB |
| Metropolitan Bank and Trust CompanyChicago | 1914–2011 | Byline Bank |
| Metropolitan Capital Bank & TrustChicago · 1 earlier name | 2005–2026 | First Independence Bank |
| Metro Savings Bank, FSBWood River · 2 earlier names | 1915–1996 | U.S. Bank National Association |
| Michigan Avenue National Bank of ChicagoChicago | 1946–1995 | U.S. Bank National Association |
| Midamerica Bank, FSBClarendon Hills · 2 earlier names | 1922–2008 | PNC Bank, National Association |
| Midamerica Bank of St. Clair CountyO Fallon | 1996–2001 | The Central Trust Bank |
| Mid-America National Bank of ChicagoChicago | 1956–1996 | Associated Bank, National Association |
| Middletown State BankMiddletown | 1917–2026 | Longview Community Bank |
| Midland Community BankKincaid | 1968–2026 | United Community Bank |
| Mid-State Savings and Loan AssociationChampaign | 1905–1989 | no successor |
| Mid Town Bank & Trust Company of ChicagoChicago · 1 earlier name | 1974–2001 | PNC Bank, National Association |
| Midwest Bank and Trust CompanyElmwood Park | 1959–2010 | The Huntington National Bank |
| midwest Bank of HinsdaleHinsdale | 1991–2002 | The Huntington National Bank |
| Midwest Bank of Mc Henry CountyUnion · 2 earlier names | 1911–2002 | The Huntington National Bank |
| Midwest Bank of OquawkaOquawka · 1 earlier name | 1919–1994 | Midwest Bank |
| Midwest Bank & Trust Company of ChicagoChicago · 1 earlier name | 1960–1991 | The Huntington National Bank |
| Midwest Community BankFreeport · 1 earlier name | 1966–2022 | no successor |
| Midwestern Savings AssociationMacomb | 1882–1990 | MidAmerica National Bank |
| Midwest Home FSBBelleville · 1 earlier name | 1922–1990 | UMB Bank, National Association |
| Midwest Savings Bank, FSBBolingbrook · 2 earlier names | 1903–2000 | Marquette Bank |
| Millbrook-Newark BankNewark · 1 earlier name | 1921–2001 | Heartland Bank and Trust Company |
| Minonk State BankMinonk | 1917–1998 | Morton Community Bank |
| Mokena State BankMokena | 1909–2000 | FNBC Bank & Trust |
| Momence Federal Savings and Loan AssociationMomence | 1904–1979 | PNC Bank, National Association |
| Morgan County Community BankJacksonville | 1981–1991 | PNC Bank, National Association |
| Morgan Park Savings and Loan AssociationChicago | 1921–1982 | GN Bank |
| Morris Building and Loan, s.b.Morris · 1 earlier name | 1917–2008 | First Secure State Bank |
| Mount Carroll National BankMount Carroll | 1934–1989 | Fifth Third Bank, National Association |
| Mount Greenwood BankChicago | 1951–1998 | CIBC Bank USA |
| Mount Prospect National BankMount Prospect | 1997–2007 | The Huntington National Bank |
| Mt. Erie State BankMount Erie | 1912–1998 | First National Bank in Olney |
| Mt. Morris Savings and Loan AssociationMount Morris | 1926–2007 | Sterling Federal Bank, F.S.B. |
| Mt. Prospect Federal Savings and Loan AssociationMount Prospect | 1957–1982 | Fifth Third Bank, National Association |
| Mt. Vernon Savings and Loan AssociationMount Vernon | 1883–1982 | Bank of America, National Association |
| Mt. Zion State BankMount Zion | 1908–1988 | Prairie State Bank and Trust |
| Mutual BankHarvey · 2 earlier names | 1962–2009 | Hanmi Bank |
| Mutual Savings and Loan AssociationCanton | 1912–1988 | First Bank |
| MWABankRock Island | 2003–2019 | no successor |
| Naper Bank BolingbrookBolingbrook · 1 earlier name | 1973–1988 | U.S. Bank National Association |
| Naperville Federal Savings and Loan AssociationSt. Charles | 1921–1981 | U.S. Bank National Association |
| National Bank of CommerceBerkeley · 1 earlier name | 1966–2009 | Republic Bank of Chicago |
| National Bank of EarlvilleEarlville | 1938–2014 | no successor |
| National Bank of Greece, S.A.Chicago | 1841–1999 | no successor |
| National Bank of JolietJoliet | 1948–1985 | Old National Bank |
| National Bank of MonticelloMonticello | 1933–1990 | JPMorgan Chase Bank, National Association |
| National Bank of PakistanChicago | 1949–2001 | no successor |
| National Bank of PetersburgPetersburg | 1948–2018 | Alliance Community Bank |
| National Bank of the Great LakesOak Brook | 1996–2003 | no successor |
| National City Bank of the MidwestBannockburn · 4 earlier names | 1863–2006 | PNC Bank, National Association |
| National Savings and Loan AssociationMount Prospect | 1889–1978 | Bank of America, National Association |
| National Security, A Federal Bank for SavingsChicago · 1 earlier name | 1907–1991 | Bank of America, National Association |
| NBD Arlington Heights BankArlington Heights · 1 earlier name | 1960–1992 | JPMorgan Chase Bank, National Association |
| NBD BankWheaton · 2 earlier names | 1926–1996 | JPMorgan Chase Bank, National Association |
| NBD Bank Elgin, National AssociationElgin · 1 earlier name | 1865–1992 | JPMorgan Chase Bank, National Association |
| NBD Bank Evanston, National AssociationEvanston · 1 earlier name | 1873–1992 | JPMorgan Chase Bank, National Association |
| NBD Bank Lake Zurich, National AssociationLake Zurich · 1 earlier name | 1976–1992 | JPMorgan Chase Bank, National Association |
| NBD Bank LemontLemont · 2 earlier names | 1979–1992 | JPMorgan Chase Bank, National Association |
| NBD Bank Mount Prospect, National AssociationMount Prospect · 1 earlier name | 1962–1992 | JPMorgan Chase Bank, National Association |
| NBD Bank, National AssociationFox River Grove · 2 earlier names | 1907–1997 | JPMorgan Chase Bank, National Association |
| NBD Bank WoodridgeWoodridge · 2 earlier names | 1971–1992 | JPMorgan Chase Bank, National Association |
| NBD Chicago BankChicago · 2 earlier names | 1964–1992 | JPMorgan Chase Bank, National Association |
| NBD Elk Grove BankElk Grove Village · 2 earlier names | 1963–1992 | JPMorgan Chase Bank, National Association |
| NBD Glenbrook BankGlenview · 2 earlier names | 1978–1992 | JPMorgan Chase Bank, National Association |
| NBD Highland Park Bank, National AssociationHighland Park · 1 earlier name | 1899–1992 | JPMorgan Chase Bank, National Association |
| NBD Northfield BankNorthfield · 1 earlier name | 1969–1992 | JPMorgan Chase Bank, National Association |
| NBD Park Ridge BankPark Ridge · 1 earlier name | 1929–1992 | JPMorgan Chase Bank, National Association |
| NBD Winfield BankWinfield · 1 earlier name | 1968–1992 | JPMorgan Chase Bank, National Association |
| NBD Woodfield BankSchaumburg · 2 earlier names | 1971–1992 | JPMorgan Chase Bank, National Association |
| New Asia BankChicago · 2 earlier names | 1987–2006 | Cathay Bank |
| New Athens Federal Savings and Loan AssociationNew Athens | 1990–1990 | U.S. Bank National Association |
| New Athens Savings and Loan AssociationNew Athens | 1904–1990 | U.S. Bank National Association |
| New Century BankChicago | 1999–2010 | Fifth Third Bank, National Association |
| New City BankChicago | 2003–2012 | no successor |
| Niles Federal Savings and Loan AssociationNiles | 1945–1986 | Citibank, National Association |
| NlsbPlainfield · 1 earlier name | 1927–2006 | BMO Bank National Association |
| Nokomis Savings BankNokomis · 1 earlier name | 1881–2024 | no successor |
| Norstates BankWaukegan · 1 earlier name | 1962–2018 | Old National Bank |
| North Adams State BankUrsa · 1 earlier name | 1980–2025 | Liberty Bank |
| North America Federal Savings and Loan AssociationForest Park | 1940–1982 | Citizens Bank, National Association |
| North BankChicago | 1970–2015 | Wintrust Bank, National Association |
| Northbrook Savings and Loan AssociationNorthbrook | 1955–1975 | Citibank, National Association |
| North Chicago Federal Savings and Loan AssociationNorth Chicago · 1 earlier name | 1912–1989 | BMO Bank National Association |
| Northern Federal Savings BankMarengo · 1 earlier name | 1925–1992 | JPMorgan Chase Bank, National Association |
| Northern Trust Bank/DuPageOak Brook · 2 earlier names | 1972–1996 | The Northern Trust Company |
| Northern Trust Bank/Lake Forest, National AssociationLake Forest · 1 earlier name | 1907–1996 | The Northern Trust Company |
| Northern Trust Bank/NapervilleNaperville · 2 earlier names | 1974–1988 | The Northern Trust Company |
| Northern Trust Bank/O'Hare National AssociationChicago · 1 earlier name | 1958–1996 | The Northern Trust Company |
| Northern Trust Bank/WoodfieldSchaumburg | 1983–1988 | The Northern Trust Company |
| North Point State BankArlington Heights | 1970–1978 | JPMorgan Chase Bank, National Association |
| Northside Community BankGurnee | 1997–2025 | no successor |
| Northtown Bank and TrustDecatur · 1 earlier name | 1956–1987 | Regions Bank |
| Northway State BankGrayslake | 1999–2005 | First Bank |
| Northwest Bank of RockfordRockford | 1972–2025 | Foresight Bank |
| Northwest Bank of Winnebago CountyRockford | 1982–1986 | Foresight Bank |
| Northwest Community BankRolling Meadows · 1 earlier name | 2007–2011 | Byline Bank |
| Northwest Community Bank of PeoriaPeoria · 1 earlier name | 1971–1988 | no successor |
| Northwestern Savings BankChicago · 1 earlier name | 1919–1996 | PNC Bank, National Association |
| North West Federal Savings and Loan Association of ChicagoChicago | 1925–1982 | Bank of America, National Association |
| Norwood Federal Savings BankChicago · 1 earlier name | 1927–1990 | JPMorgan Chase Bank, National Association |
| Oak BankChicago · 1 earlier name | 1970–2019 | Wintrust Bank, National Association |
| Oak Brook BankOak Brook | 1962–2006 | Fifth Third Bank, National Association |
| Oakdale State BankOakdale | 1920–2025 | Murphy-Wall State Bank and Trust Company |
| Oak Lawn BankOak Lawn | 1999–2006 | First Bank |
| Oak Lawn National BankOak Lawn | 1983–1991 | Fifth Third Bank, National Association |
| Oak Lawn Trust & Savings BankOak Lawn | 1925–1992 | Fifth Third Bank, National Association |
| Odell State BankOdell | 1949–2001 | Bank of Pontiac |
| Okaw Building and Loan, s.b.Mattoon · 1 earlier name | 1901–2004 | Washington Savings Bank |
| Old Farmers & Merchants State BankHillsdale | 1903–2006 | Morton Community Bank |
| Old Kent BankElmhurst · 3 earlier names | 1931–1997 | Fifth Third Bank, National Association |
| Old Kent BankWheaton · 3 earlier names | 1959–1990 | Fifth Third Bank, National Association |
| Old Kent Bank, National AssociationElmhurst · 3 earlier names | 1894–1992 | Fifth Third Bank, National Association |
| Old Kent Bank-NorthwestRolling Meadows · 2 earlier names | 1974–1989 | Fifth Third Bank, National Association |
| Old Kent Bank-St. Charles, National AssociationSt. Charles · 2 earlier names | 1902–1990 | Fifth Third Bank, National Association |
| Old Kent, National AssociationFreeport · 1 earlier name | 1985–2000 | Fifth Third Bank, National Association |
| Old Second Bank-Kane CountyElburn · 2 earlier names | 1890–2007 | Old Second National Bank |
| Old Second Bank-YorkvilleYorkville · 1 earlier name | 1902–2007 | Old Second National Bank |
| Olympic Federal Savings and Loan AssociationBerwyn · 1 earlier name | 1913–1990 | Fifth Third Bank, National Association |
| Olympic Federal Savings AssociationBerwyn | 1990–1992 | Fifth Third Bank, National Association |
| Olympic Savings and Loan AssociationFranklin Park | 1937–1982 | Fifth Third Bank, National Association |
| Omni BankHull · 1 earlier name | 1906–1994 | Midland States Bank |
| Omni BankPontoon Beach | 1991–1998 | Busey Bank |
| Orangeville Community BankOrangeville | 1956–2002 | Community Bank |
| Orland State BankOrland Park | 1920–1996 | Marquette Bank |
| Oswego Community BankOswego | 1958–2013 | Byline Bank |
| Ottawa National BankOttawa | 1953–1991 | Midland States Bank |
| Oxford BankRomeoville · 2 earlier names | 1970–1994 | JPMorgan Chase Bank, National Association |
| Oxford Bank & TrustOak Brook · 1 earlier name | 1902–2022 | no successor |
| Pacific Global BankChicago | 1995–2020 | Royal Business Bank |
| Palatine Savings and Loan AssociationPalatine | 1956–1987 | Citibank, National Association |
| Palmer-American National Bank of DanvilleDanville | 1892–1999 | Old National Bank |
| Palmer BankTaylorville · 1 earlier name | 1912–2011 | Heartland Bank and Trust Company |
| Palos Bank and Trust CompanyPalos Heights · 1 earlier name | 1956–2010 | Old National Bank |
| Palos Savings and Loan AssociationPalos Heights | 1959–1982 | JPMorgan Chase Bank, National Association |
| Pana Federal Savings and Loan AssociationPana | 1949–1998 | no successor |
| Parish Bank and Trust CompanyMomence | 1932–2004 | Midland States Bank |
| Park Federal Savings BankChicago · 1 earlier name | 1921–2016 | Peoples Bank |
| Park National BankChicago · 3 earlier names | 1883–2009 | U.S. Bank National Association |
| Park National Bank and Trust of ChicagoChicago · 1 earlier name | 1950–2006 | U.S. Bank National Association |
| Parkway BankCarpentersville · 1 earlier name | 1992–1997 | Parkway Bank and Trust Company |
| Parkway Bank of SchaumburgSchaumburg | 1989–1996 | Parkway Bank and Trust Company |
| Partners BankGlen Carbon | 2000–2008 | First Mid Bank & Trust, National Association |
| Pathway Financial, A Federal AssociationChicago | 1948–1991 | Citibank, National Association |
| Pekin National BankPekin | 1965–2015 | Community Partners Savings Bank |
| Pekin Savings BankPekin · 1 earlier name | 1882–2005 | Morton Community Bank |
| Peoples Bank for SavingsStreator · 1 earlier name | 1904–1989 | Old National Bank |
| Peoples Bank of AlbersAlbers | 1901–1990 | FCB Banks |
| Peoples Bank of CambridgeCambridge | 1934–1996 | BankOrion |
| Peoples Building and Loan Association of OblongOblong | 1915–1991 | First Financial Bank, National Association |
| Peoples Federal Savings and Loan AssociationChicago · 2 earlier names | 1912–1995 | Fifth Third Bank, National Association |
| Peoples Federal Savings and Loan AssociationChillicothe | 1933–1983 | Associated Bank, National Association |
| Peoples Savings and Loan AssociationJoliet | 1874–1981 | PNC Bank, National Association |
| Peoples Savings and Loan Association, FAStreator | 1989–1990 | Old National Bank |
| Peoples Savings Association of LawrencevilleLawrenceville | 1923–1983 | First Financial Bank, National Association |
| People's State BankManito | 1905–2006 | Morton Community Bank |
| Peoples State Bank of ChandlervilleChandlerville | 1973–2007 | Petefish, Skiles & Co. |
| Peoples State Bank of MansfieldMansfield | 1910–2006 | First Mid Bank & Trust, National Association |
| Peoples State Bank of RoanokeRoanoke | 1945–1986 | Commerce Bank |
| Peoria Savings and Loan AssociationPeoria | 1889–1988 | First Bank |
| Peotone Bank and Trust CompanyPeotone · 1 earlier name | 1916–2010 | Old National Bank |
| Peterson BankChicago · 1 earlier name | 1970–1997 | Fifth Third Bank, National Association |
| Pinnacle BankCicero · 1 earlier name | 1962–1999 | Fifth Third Bank, National Association |
| Pinnacle Bank FSBBatavia · 3 earlier names | 1909–1997 | Fifth Third Bank, National Association |
| Pinnacle Bank of the Quad CitiesSilvis · 1 earlier name | 1950–1999 | Fifth Third Bank, National Association |
| Pioneer Bank of PeoriaPeoria · 1 earlier name | 1970–1985 | PNC Bank, National Association |
| Pioneer Bank & Trust CompanyChicago · 1 earlier name | 1913–1990 | Popular Bank |
| Pioneer Savings and Loan AssociationWheeling | 1904–1976 | Hoyne Savings Bank |
| Pioneer State BankEarlville · 1 earlier name | 1901–2023 | no successor |
| Plainfield Savings and Loan AssociationPlainfield | 1961–1981 | JPMorgan Chase Bank, National Association |
| PlainsBank of Illinois, National AssociationDes Plaines · 1 earlier name | 1957–2002 | First Bank |
| Platinum Community BankRolling Meadows | 1999–2009 | no successor |
| Plaza Bank, Norridge, IllinoisNorridge · 1 earlier name | 1959–2013 | Byline Bank |
| PNA BankChicago · 3 earlier names | 1891–2015 | Peoples Bank |
| Pontiac Savings and Loan AssociationPontiac | 1885–1976 | PNC Bank, National Association |
| Port Byron State BankPort Byron | 1863–2016 | Blackhawk Bank & Trust |
| Prairie Bank and Trust CompanyBridgeview | 1992–2007 | Old National Bank |
| Prairie Federal Savings and Loan Association Chicago HeightsMatteson | 1934–1982 | Citibank, National Association |
| Prairie National BankStewardson · 1 earlier name | 1928–2015 | First National Bank of Waterloo |
| Preferred BankCasey | 1999–2026 | Prospect Bank |
| Premier BankWilmette | 2000–2012 | International Bank of Chicago |
| Premier Bank of JacksonvilleJacksonville · 1 earlier name | 1873–2016 | Heartland Bank and Trust Company |
| Prospect Federal Savings BankWorth · 1 earlier name | 1909–2017 | Hoyne Savings Bank |
| Prospect National Bank of PeoriaPeoria | 1954–1989 | PNC Bank, National Association |
| Provident Federal Savings and Loan Association of PeoriaPeoria | 1873–1982 | JPMorgan Chase Bank, National Association |
| Public Federal Savings and Loan AssociationCalumet City | 1913–1983 | Citizens Bank, National Association |
| Public Savings and Loan Association of ChicagoChicago | 1910–1981 | Fifth Third Bank, National Association |
| Pulaski Savings BankChicago · 1 earlier name | 1890–2025 | Millennium Bank |
| Pullman Bank of Commerce & IndustryChicago · 1 earlier name | 1919–1997 | U.S. Bank National Association |
| Quad City Bank and Trust Company - IllinoisMoline | 1997–1997 | Quad City Bank and Trust Company |
| Quincy-Peoples Savings and Loan AssociationQuincy | 1874–1981 | Bank of America, National Association |
| Rantoul First Bank, s.b.Rantoul · 1 earlier name | 1952–2005 | First Mid Bank & Trust, National Association |
| Ravenswood BankChicago · 1 earlier name | 1996–2010 | Northbrook Bank and Trust Company, National Association |
| Regency Savings Bank, A FSBNaperville · 1 earlier name | 1885–2006 | U.S. Bank National Association |
| Reliance BankGodfrey · 1 earlier name | 1999–2005 | Simmons Bank |
| Reliance Federal Savings and Loan AssociationStreamwood | 1908–1982 | JPMorgan Chase Bank, National Association |
| Rend Lake BankBenton | 1976–1995 | U.S. Bank National Association |
| Republic Federal Savings BankNaperville | 1992–1992 | U.S. Bank National Association |
| Republic Savings, A Federal Savings and Loan AssociationSouth Beloit | 1986–1988 | First Bank |
| Republic Savings BankSouth Beloit · 1 earlier name | 1962–1986 | First Bank |
| Republic Savings Bank, FSBMatteson | 1985–1992 | U.S. Bank National Association |
| Reserve Savings and Loan AssociationElmhurst | 1921–1981 | JPMorgan Chase Bank, National Association |
| Reynolds State BankReynolds | 1888–2021 | Peoples National Bank of Kewanee |
| Richton Savings and Loan AssociationRichton Park | 1910–1976 | Citizens Bank, National Association |
| Ridgeland Savings and Loan AssociationBerwyn | 1921–1982 | PNC Bank, National Association |
| Riverdale BankRiverdale | 1917–1994 | Fifth Third Bank, National Association |
| River Forest State Bank and Trust CompanyRiver Forest | 1913–1996 | Fifth Third Bank, National Association |
| Riverside Savings, A Federal Savings and Loan AssociationRiverside · 2 earlier names | 1922–1990 | Bank of America, National Association |
| Riverton Community BankRiverton | 1965–2004 | INB, National Association |
| River Valley Savings BankRock Falls · 1 earlier name | 1962–1991 | First Bank |
| Roberts State BankRoberts | 1920–2002 | Vermilion Valley Bank |
| Rochester State BankRochester | 1912–2021 | American Bank of Freedom |
| Rock City BankRock City | 1931–1988 | U.S. Bank National Association |
| Rock Falls National BankRock Falls | 1945–1991 | U.S. Bank National Association |
| Rockford Bank and Trust CompanyRockford | 2005–2019 | UMB Bank, National Association |
| Rock Island Federal Savings and Loan AssociationRock Island | 1880–1982 | PNC Bank, National Association |
| Rock River BankOregon · 2 earlier names | 1935–2009 | The Harvard State Bank |
| Rogers Park Savings and Loan AssociationNorthbrook | 1957–1976 | Citibank, National Association |
| Roodhouse National BankRoodhouse | 1873–1988 | First Bank |
| Roseville State BankRoseville | 1944–1995 | Morton Community Bank |
| Royal American BankInverness | 1991–2006 | The Huntington National Bank |
| Royal Savings BankChicago · 1 earlier name | 1887–2022 | Peoples Bank |
| Salem Building and Loan AssociationSalem | 1884–1981 | Regions Bank |
| Saline County State BankStonefort | 1901–2000 | First Southern Bank |
| Sangamon Bank and TrustSpringfield · 1 earlier name | 1974–1988 | PNC Bank, National Association |
| Sangamon Home Savings AssociationSpringfield | 1924–1981 | Security Bank, s.b. |
| San Jose Tri-County BankSan Jose | 1944–2005 | no successor |
| Sauk Prairie Savings and Loan AssociationFrankfort | 1973–1981 | no successor |
| Savanna State BankSavanna | 1965–2002 | Fidelity Bank |
| Schuyler State BankRushville | 1967–2013 | Morton Community Bank |
| Seaway Bank and Trust CompanyChicago · 1 earlier name | 1965–2017 | State Bank of Texas |
| Second Federal Savings and Loan Association of ChicagoChicago | 1923–2012 | Hinsdale Bank & Trust Company, National Association |
| Security Bank and Trust Co.Mount Carmel | 1936–1998 | Old National Bank |
| Security Bank and Trust CompanyCairo · 1 earlier name | 1934–1982 | First National Bank |
| Security Bank of DuPageNaperville · 3 earlier names | 1970–2004 | Hanmi Bank |
| Security Federal Savings and Loan AssociationPeoria | 1989–1990 | Associated Bank, National Association |
| Security Federal Savings and Loan Association of ChicagoChicago | 1907–1997 | Fifth Third Bank, National Association |
| Security National BankWitt · 1 earlier name | 1932–2024 | Bank & Trust Company |
| Security Savings and Loan AssociationDecatur | 1960–1983 | First Bank |
| Security Savings and Loan Association, FAPeoria | 1880–1989 | Associated Bank, National Association |
| Security Savings Bank, F.S.B.Hillsboro | 1990–1996 | Constitution Bank, National Association |
| Security State Bank of HamiltonHamilton | 1946–2006 | United Community Bank |
| SENB BankMoline · 1 earlier name | 1999–2023 | CBI Bank & Trust |
| Service Federal Savings and Loan AssociationChicago | 1950–1976 | GN Bank |
| Sheldon Building and Loan AssociationSheldon | 1889–1981 | Servbank, National Association |
| Sheridan State BankSheridan | 1947–2016 | The Granville National Bank |
| Sherman Community Bank & Trust CompanySherman · 1 earlier name | 1979–1988 | United Community Bank |
| ShoreBankChicago · 2 earlier names | 1939–2010 | Providence Bank & Trust |
| Sidell State BankSidell | 1934–2015 | Prospect Bank |
| Signature BankRosemont | 2006–2026 | Esquire Bank, National Association |
| Skokie Federal Savings and Loan AssociationSkokie | 1956–1990 | Bank of America, National Association |
| South Central Bank, National AssociationChicago · 2 earlier names | 1966–2020 | no successor |
| Southeast National Bank of MolineMoline | 1961–1999 | CBI Bank & Trust |
| South End Savings, s.b.Homewood · 1 earlier name | 1914–2015 | First Savings Bank of Hegewisch |
| Southern Illinois Savings and Loan AssociationMurphysboro | 1890–1976 | Regions Bank |
| South Holland Trust & Savings BankSouth Holland | 1911–2003 | Fifth Third Bank, National Association |
| Southpark National Bank of The Quad CitiesMoline · 1 earlier name | 1965–1989 | PNC Bank, National Association |
| South Pointe BankMarion | 1995–2006 | MidCountry Bank |
| South Porte BankMarion · 5 earlier names | 1956–2020 | SouthernTrust Bank |
| South Shores National Bank of DecaturDecatur | 1965–1988 | PNC Bank, National Association |
| South Side BankChicago | 1972–1981 | Providence Bank & Trust |
| South Side Trust & Savings Bank of PeoriaPeoria | 1922–2018 | Busey Bank |
| Southwest BankBelleville | 1998–2003 | BMO Bank National Association |
| Southwest Federal Savings and Loan Association of ChicagoChicago | 1893–1998 | Citizens Bank, National Association |
| Southwest Financial BankEvergreen Park · 1 earlier name | 1957–1988 | Hinsdale Bank & Trust Company, National Association |
| Southwest Financial Bank and Trust CompanyNew Lenox · 3 earlier names | 1978–1996 | Hinsdale Bank & Trust Company, National Association |
| Southwest Financial Bank and Trust CompanyOrland Park · 3 earlier names | 1978–1997 | Hinsdale Bank & Trust Company, National Association |
| Southwest Suburban BankBolingbrook | 1980–1998 | BMO Bank National Association |
| Soy Capital Bank and Trust CompanyDecatur | 1956–2019 | First Mid Bank & Trust, National Association |
| Standard Bank and Trust CompanyHickory Hills · 3 earlier names | 1947–2017 | Old National Bank |
| Standard Bank and Trust Company of Hickory HillsHickory Hills · 1 earlier name | 1970–1992 | Old National Bank |
| Standard Chartered Bank, PlcChicago | 1853–1994 | no successor |
| Standard Federal Bank for SavingsChicago · 1 earlier name | 1909–1997 | The Huntington National Bank |
| Stanford State BankStanford | 1891–1988 | Regions Bank |
| State BankFreeport | 1999–2025 | Foresight Bank |
| State Bank and TrustNorth Barrington · 1 earlier name | 1998–2006 | The Huntington National Bank |
| State Bank of ArthurArthur | 1910–2017 | Morton Community Bank |
| State Bank of AuburnAuburn | 1941–2005 | United Community Bank |
| State Bank of AugustaAugusta | 1929–2006 | United Community Bank |
| State Bank of BreeseBreese | 1911–1994 | First Bank |
| State Bank of Cerro GordoCerro Gordo · 1 earlier name | 1894–2022 | State Bank of Bement |
| State Bank of ClearingChicago | 1913–1975 | Fifth Third Bank, National Association |
| State Bank of ColusaColusa | 1919–2008 | Fortress Bank |
| State Bank of CornlandCornland | 1920–1990 | Heartland Bank and Trust Company |
| State Bank of CubaCuba | 1902–1987 | MidAmerica National Bank |
| State Bank of DavisDavis | 1928–2025 | Foresight Bank |
| State Bank of FarinaFarina | 1902–1999 | Midland States Bank |
| State Bank of FarmersvilleFarmersville | 1895–1985 | Bank & Trust Company |
| State Bank of FreeportFreeport | 1891–1995 | U.S. Bank National Association |
| State Bank of GirardGirard | 1873–1993 | The First National Bank of Raymond |
| State Bank of HerscherHerscher | 1902–2025 | Foresight Bank |
| State Bank of KeyesportKeyesport | 1913–1997 | Constitution Bank, National Association |
| State Bank of LincolnLincoln · 1 earlier name | 1904–2020 | Heartland Bank and Trust Company |
| State Bank of NianticNiantic | 1890–2014 | Scott State Bank |
| State Bank of OscoOsco | 1920–1996 | Central Bank Illinois |
| State Bank of Prairie du RocherPrairie Du Rocher | 1906–2012 | Buena Vista National Bank |
| State Bank of SauneminSaunemin | 1911–2022 | State Bank of Graymont |
| State Bank of Scales MoundScales Mound | 1916–1984 | U.S. Bank National Association |
| State Bank of SpeerSpeer | 1902–2018 | Morton Community Bank |
| State Bank of St. JacobSaint Jacob | 1903–2026 | The Bradford National Bank of Greenville |
| State Bank of St. JosephSt. Joseph | 1956–1989 | Busey Bank |
| State Bank of SullivanSullivan | 1969–1992 | First Mid Bank & Trust, National Association |
| State Bank of VirdenVirden | 1966–1993 | The First National Bank of Raymond |
| State Farm Bank, F.S.B.Bloomington · 1 earlier name | 1999–2021 | no successor |
| State Financial BankRichmond · 2 earlier names | 1921–2000 | Associated Bank, National Association |
| State Savings and Loan Association of GeneseoGeneseo | 1963–1983 | Tbk Bank, SSB |
| State Savings and Loan Association of KankakeeKankakee | 1961–1982 | Fifth Third Bank, National Association |
| Staunton Home AssociationStaunton | 1901–1981 | U.S. Bank National Association |
| STC Capital BankSaint Charles | 2006–2019 | St. Charles Bank & Trust Company, National Association |
| St. Charles Federal Savings AssociationSt. Charles | 1990–1990 | Fifth Third Bank, National Association |
| St Charles Savings and Loan AssociationSt. Charles | 1891–1990 | Fifth Third Bank, National Association |
| Sterling Savings BankChicago · 2 earlier names | 1919–1999 | U.S. Bank National Association |
| St Paul Federal Bank for SavingsChicago | 1889–1999 | Citizens Bank, National Association |
| Strasburg State BankStrasburg | 1917–1995 | Shelby County State Bank |
| Strategic Capital BankChampaign | 1999–2009 | Midland States Bank |
| Streator Federal Savings and Loan AssociationStreator | 1910–1979 | PNC Bank, National Association |
| Suburban Bank of BarringtonBarrington · 1 earlier name | 1968–2005 | BMO Bank National Association |
| Suburban Bank & Trust CompanyElmhurst · 2 earlier names | 1971–2015 | Hinsdale Bank & Trust Company, National Association |
| Suburban Bank & Trust CompanyElmhurst · 1 earlier name | 1976–1996 | Hinsdale Bank & Trust Company, National Association |
| Suburban Federal Savings, a Federal Savings BankFlossmoor · 1 earlier name | 1911–1998 | First Merchants Bank |
| Suburban National Bank of Lake CountyVernon Hills · 1 earlier name | 1968–1993 | BMO Bank National Association |
| Suburban National Bank of WoodfieldSchaumburg | 1974–1990 | BMO Bank National Association |
| Suburban Savings and Loan AssociationBerwyn | 1917–1981 | Fifth Third Bank, National Association |
| Suburban Trust and Savings BankOak Park | 1912–1995 | Fifth Third Bank, National Association |
| Success National BankLincolnshire · 1 earlier name | 1973–2001 | First Financial Bank |
| Sullivan Savings and Loan AssociationSullivan | 1887–1976 | First Bank |
| Summit First Federal Savings and Loan AssociationSummit | 1914–1990 | Marquette Bank |
| Summit First Savings and Loan Association, F.A.Summit | 1990–1990 | Marquette Bank |
| Sumner National Bank of SheldonSheldon · 2 earlier names | 1902–2016 | Iroquois Farmers State Bank |
| Sunstar BankWashington · 2 earlier names | 1972–1999 | Morton Community Bank |
| Superior Bank FSBHinsdale · 1 earlier name | 1988–2001 | no successor |
| Superior Federal Bank, FSBHinsdale | 2001–2004 | no successor |
| Table Grove Savings and LoanTable Grove | 1920–1977 | Associated Bank, National Association |
| Tampico National BankTampico | 1947–1997 | Midland States Bank |
| Taylorville Savings and Loan AssociationTaylorville | 1884–1982 | PNC Bank, National Association |
| TCF National Bank IllinoisBurr Ridge · 3 earlier names | 1928–2000 | The Huntington National Bank |
| Telegraph Savings and Loan AssociationChicago | 1894–1980 | Citibank, National Association |
| Tempo Bank, A Federal Savings BankTrenton · 1 earlier name | 1889–2022 | no successor |
| Texico State BankTexico | 1920–2021 | no successor |
| The BankCharleston · 1 earlier name | 1973–2007 | Prairie State Bank and Trust |
| The Bank of AlexisAlexis | 1887–1992 | Farmers State Bank of Western Illinois |
| The Bank of AltonAlton | 1956–1997 | U.S. Bank National Association |
| The Bank of CarbondaleCarbondale | 1919–2022 | First Southern Bank |
| The Bank of CommerceWood Dale | 1997–2011 | Schaumburg Bank & Trust Company, National Association |
| The Bank of EdwardsvilleEdwardsville | 1868–2019 | Busey Bank |
| The Bank of HarrisburgHarrisburg · 2 earlier names | 1966–1995 | Old National Bank |
| The Bank of HerrinHerrin | 1937–2007 | The Bank of Herrin |
| The Bank of Lawrence CountyBridgeport | 1998–2015 | Citizens National Bank of Albion |
| The Bank of YorkvilleYorkville | 1914–1999 | First National Bank of Omaha |
| The Belvidere National Bank and Trust CompanyBelvidere | 1908–2008 | Midland States Bank |
| The Berwyn National BankBerwyn | 1937–1993 | Fifth Third Bank, National Association |
| The Bronson-Gore Bank in Prospect HeightsProspect Heights · 1 earlier name | 1975–1999 | Popular Bank |
| The Champaign National BankChampaign | 1882–1995 | Busey Bank |
| The Citizens National Bank of DecaturDecatur | 1891–1988 | PNC Bank, National Association |
| The Citizens National Bank of ParisParis | 1902–2012 | First Farmers Bank & Trust Co. |
| The Citizens National Bank of TolucaToluca | 1919–1998 | Morton Community Bank |
| The City National BankMurphysboro · 1 earlier name | 1892–1993 | Regions Bank |
| The City National Bank of DanvilleDanville · 1 earlier name | 1974–1993 | Old National Bank |
| The City National Bank of HoopestonHoopeston | 1933–1993 | Old National Bank |
| The Coffeen National BankCoffeen | 1905–1984 | United Community Bank |
| The Cosmopolitan National Bank of ChicagoChicago | 1936–1991 | U.S. Bank National Association |
| The Des Plaines BankDes Plaines | 1961–1981 | no successor |
| The Drovers' National Bank of ChicagoChicago | 1883–1978 | Fifth Third Bank, National Association |
| The Dulaney National Bank of MarshallMarshall | 1879–1999 | Old National Bank |
| The Egyptian State BankCarrier Mills | 1951–2005 | First Southern Bank |
| The Elgin State BankElgin · 1 earlier name | 1964–2011 | St. Charles Bank & Trust Company, National Association |
| The Elizabeth State BankElizabeth | 1909–2009 | UMB Bank, National Association |
| The Farmers and Merchants State Bank of Virden, IllinoisVirden | 1910–2007 | Prairie State Bank and Trust |
| The Farmers National Bank of GeneseoGeneseo | 1876–1997 | Wells Fargo Bank, National Association |
| The Farmers State Bank of LostantLostant | 1895–1988 | Illini State Bank |
| The First Chicago Bank of Mount ProspectMount Prospect · 1 earlier name | 1911–1992 | JPMorgan Chase Bank, National Association |
| The First Commercial BankChicago | 1946–2011 | Byline Bank |
| The First National BankMattoon · 1 earlier name | 1904–2021 | Washington Savings Bank |
| The First National Bank and Trust Company of Douglas CountyTuscola · 1 earlier name | 1982–1992 | First Mid Bank & Trust, National Association |
| The First National Bank and Trust Company of TuscolaTuscola | 1866–1982 | First Mid Bank & Trust, National Association |
| The First National Bank in BlandinsvilleBlandinsville | 1907–1994 | Midland States Bank |
| The First National Bank in DoltonDolton | 1934–1991 | Fifth Third Bank, National Association |
| The First National Bank in ElizabethtownElizabethtown · 1 earlier name | 1903–1994 | Old National Bank |
| The First National Bank in MadisonMadison | 1934–1994 | Regions Bank |
| The First National Bank in StauntonStaunton | 1934–2020 | Associated Bank, National Association |
| The First National Bank of BeardstownBeardstown | 1887–2024 | Petefish, Skiles & Co. |
| The First National Bank of BridgeportBridgeport | 1906–2000 | Old National Bank |
| The First National Bank of BrightonBrighton | 1909–1992 | U.S. Bank National Association |
| The First National Bank of Central IllinoisSpringfield · 1 earlier name | 1863–1998 | U.S. Bank National Association |
| The First National Bank of ChrismanChrisman | 1904–2015 | First Farmers Bank & Trust Co. |
| The First National Bank of CliftonClifton | 1902–2004 | The First Trust and Savings Bank of Watseka, Illinois |
| The First National Bank of CollinsvilleCollinsville | 1902–1988 | UMB Bank, National Association |
| The First National Bank of CoultervilleCoulterville | 1914–2003 | First State Bank of Campbell Hill |
| The First National Bank of CrossvilleCrossville | 1907–1993 | Old National Bank |
| The First National Bank of CullomCullom | 1907–1991 | Vermilion Valley Bank |
| The First National Bank of DanversDanvers | 1904–1983 | United Community Bank |
| The First National Bank of DanvilleDanville | 1857–2009 | First Financial Bank, National Association |
| The First National Bank of DecaturDecatur | 1873–2004 | Busey Bank |
| The First National Bank of Des PlainesDes Plaines | 1913–1994 | U.S. Bank National Association |
| The First National Bank of DwightDwight | 1905–2018 | Peoples National Bank of Kewanee |
| The First National Bank of EffinghamEffingham | 1890–1995 | Fifth Third Bank, National Association |
| The First National Bank of EnfieldEnfield | 1917–1996 | The First National Bank of Carmi |
| The First National Bank of GalenaGalena | 1933–1995 | U.S. Bank National Association |
| The First National Bank of GilmanGilman | 1869–2009 | Prospect Bank |
| The First National Bank of Grant ParkGrant Park | 1921–2013 | Midland States Bank |
| The First National Bank of HarrisburgHarrisburg | 1889–1999 | Old National Bank |
| The First National Bank of HighlandHighland | 1891–1994 | U.S. Bank National Association |
| The First National Bank of JonesboroJonesboro | 1893–2007 | First Mid Bank & Trust, National Association |
| The First National Bank of Lake BluffLake Bluff | 1965–1988 | The Northern Trust Company |
| The First National Bank of LernaLerna | 1906–2005 | The Bank of Advance |
| The First National Bank of LincolnwoodLincolnwood | 1955–2002 | Fifth Third Bank, National Association |
| The First National Bank of ManliusManlius | 1902–1997 | Midland States Bank |
| The First National Bank of MarengoMarengo · 1 earlier name | 1976–2007 | First National Bank of Omaha |
| The First National Bank of McHenryMchenry | 1969–2019 | First Mid Bank & Trust, National Association |
| The First National Bank of Mt. AuburnMount Auburn | 1911–2008 | First National Bank in Taylorville |
| The First National Bank of Mt. PulaskiMount Pulaski | 1888–2008 | Midwest BankCentre |
| The First National Bank of NormalNormal | 1893–1987 | Commerce Bank |
| The First National Bank of OblongOblong | 1907–1999 | Old National Bank |
| The First National Bank of OgdenOgden | 1900–2014 | Longview Bank |
| The First National Bank of PetersburgPetersburg | 1865–1992 | PNC Bank, National Association |
| The First National Bank of SmithtonSmithton | 1922–1985 | Regions Bank |
| The First National Bank of StocktonStockton | 1933–1987 | Fifth Third Bank, National Association |
| The First National Bank of SumnerOlney | 1903–2004 | no successor |
| The First National Bank of ThomasboroThomasboro | 1906–1988 | Busey Bank |
| The First National Bank of Villa GroveVilla Grove | 1904–1989 | Villa Grove State Bank |
| The First National Bank of WestvilleWestville | 1904–1996 | First Financial Bank, National Association |
| The First National Bank & Trust Company of RochelleRochelle · 1 earlier name | 1934–2017 | Central Bank Illinois |
| The First Pacific Bank of ChicagoChicago | 1972–1981 | First American Bank |
| The First State Bank of CentraliaCentralia | 1965–1988 | Regions Bank |
| The First State Bank of Little YorkLittle York | 1916–1984 | Wells Fargo Bank, National Association |
| The First State Bank of MoundsMounds | 1906–1995 | MidCountry Bank |
| The First State Bank of ViennaVienna | 1957–1998 | Old National Bank |
| The First State Bank of Winchester, IllinoisWinchester | 1867–2009 | Petefish, Skiles & Co. |
| The Foster BankChicago | 1989–2013 | Bank of Hope |
| The Gifford State BankGifford · 1 earlier name | 1885–2026 | The Fountain Trust Company |
| The Greenup National BankGreenup | 1906–2001 | First Neighbor Bank, National Association |
| The Heights BankPeoria Heights | 1973–2011 | First State Bank of Forrest |
| The Henry County BankGreen Rock · 1 earlier name | 1968–1992 | Fifth Third Bank, National Association |
| The Hight State BankDalton City | 1892–1998 | Scott State Bank |
| The Hill-Dodge Banking CompanyWarsaw | 1864–2025 | Town & Country Bank Midwest |
| The Ina State BankIna | 1919–1983 | U.S. Bank National Association |
| The Irving BankChicago | 1951–1999 | Popular Bank |
| The Jasper County Savings and Loan AssociationNewton | 1884–1990 | First Financial Bank, National Association |
| The John Warner BankClinton | 1867–2009 | Heartland Bank and Trust Company |
| The Larkin BankHoffman Estates | 1970–1992 | JPMorgan Chase Bank, National Association |
| The Leaders BankOak Brook | 2000–2022 | Providence Bank & Trust |
| The Lemont National BankLemont | 1901–2026 | no successor |
| The Lewistown BankLewistown · 1 earlier name | 1894–1987 | MidAmerica National Bank |
| The Merchants National Bank of AuroraAurora | 1888–2000 | Fifth Third Bank, National Association |
| The Morton Trust & Savings BankMorton | 1982–1989 | Morton Community Bank |
| The National Bank of CarmiCarmi | 1900–1998 | Old National Bank |
| The National Bank & Trust Company of SycamoreSycamore | 1867–2016 | Old National Bank |
| The National Republic Bank of ChicagoChicago | 1897–2014 | State Bank of Texas |
| The National Security Bank of ChicagoChicago | 1933–1994 | U.S. Bank National Association |
| The National State Bank of MetropolisMetropolis | 1895–2000 | Banterra Bank |
| The National Stock Yards National Bank of National CityNational City | 1926–1977 | Lindell Bank & Trust Company |
| The Oakland National BankOakland | 1874–1997 | First Farmers Bank & Trust Co. |
| The Old Second Community Bank of AuroraAurora · 1 earlier name | 1977–1999 | Old Second National Bank |
| The Old Second Community Bank of North AuroraNorth Aurora · 1 earlier name | 1970–1999 | Old Second National Bank |
| The Peoples' Bank of Arlington HeightsArlington Heights | 1999–2015 | Old National Bank |
| The Peoples National Bank of GrayvilleGrayville | 1937–1998 | Old National Bank |
| The Pershing National Bank of DecaturDecatur | 1964–1988 | PNC Bank, National Association |
| The Polo National BankPolo | 1935–1989 | Fifth Third Bank, National Association |
| The Poplar Grove State BankPoplar Grove | 1946–2020 | Solutions Bank |
| The Ramsey State BankRamsey · 1 earlier name | 1910–1994 | The FNB Community Bank |
| The Rochelle Bank and Trust CompanyRochelle · 1 earlier name | 1957–1980 | Stillman BancCorp N.A. |
| The South East National Bank of ChicagoChicago | 1935–1972 | Associated Bank, National Association |
| The State Bank of AllertonAllerton | 1908–2004 | Philo Exchange Bank |
| The State Bank of AnnawanAnnawan | 1921–2007 | BankOrion |
| The State Bank of Blue MoundBlue Mound | 1912–2015 | First National Bank of Pana |
| The State Bank of HammondHammond | 1901–2002 | First State Bank and Trust |
| The State Bank of JerseyvilleJerseyville | 1890–2001 | First Bank |
| The State Bank of KirklandKirkland | 1913–1991 | Midland States Bank |
| The State Bank of LimaLima | 1910–2015 | Town & Country Bank Midwest |
| The St. Clair National Bank of BellevilleBelleville | 1919–1971 | Regions Bank |
| The Stillman Bank of RochelleRochelle · 1 earlier name | 1980–1988 | Stillman BancCorp N.A. |
| The Taylor State BankEmington | 1917–1985 | Peoples National Bank of Kewanee |
| The Union National Bank of MacombMacomb | 1871–1997 | MidAmerica National Bank |
| The Valley Bank of IllinoisCherry Valley · 1 earlier name | 1974–1994 | Midland States Bank |
| The Village BankSaint Libory · 1 earlier name | 1920–2023 | First National Bank of Waterloo |
| The Whaples and Farmers State BankNeponset | 1919–2004 | The Granville National Bank |
| Thornridge State BankSouth Holland | 1974–1994 | Fifth Third Bank, National Association |
| Timewell State BankTimewell | 1910–2010 | Farmers State Bank & Trust Co. |
| Tinley Park BankTinley Park | 1973–1994 | Fifth Third Bank, National Association |
| TNB BankTuscola · 2 earlier names | 1890–2022 | TrustBank |
| Tower Federal Savings and Loan AssociationWestern Springs | 1925–1982 | no successor |
| Town And Country BankSpringfield · 2 earlier names | 1962–2023 | Heartland Bank and Trust Company |
| Town Community Bank and TrustAntioch · 2 earlier names | 2000–2010 | First American Bank |
| Town & Country BankBuffalo · 1 earlier name | 1911–2009 | Heartland Bank and Trust Company |
| Tremont Savings BankTremont · 1 earlier name | 1924–2010 | Morton Community Bank |
| Tri-City Savings and Loan AssociationLombard | 1925–1977 | Citizens Bank, National Association |
| Tri-County BankMinooka · 1 earlier name | 1964–1998 | CIBC Bank USA |
| Tri-State BankMarkham | 1962–1982 | no successor |
| Triumph Community Bank, National AssociationMoline · 1 earlier name | 2005–2015 | Tbk Bank, SSB |
| Troy Savings and Homestead AssociationTroy | 1904–1985 | Collinsville Building and Loan Association |
| Twin Oaks Savings BankMarseilles · 1 earlier name | 1890–2014 | OSB Community Bank |
| UMB First State Bank of MorrisonvilleMorrisonville · 1 earlier name | 1930–1999 | UMB Bank, National Association |
| UnibancTrust/HawthorneWheaton · 1 earlier name | 1962–1989 | Fifth Third Bank, National Association |
| UnionBank/CentralPrinceton · 1 earlier name | 1944–2003 | Midland States Bank |
| UnionBank/NorthwestHanover · 1 earlier name | 1952–2004 | Midland States Bank |
| Union Bank of IllinoisSwansea · 3 earlier names | 1901–2001 | First Bank |
| Union Bank/SandwichSandwich · 1 earlier name | 1984–1997 | Midland States Bank |
| Union Bank/TriumphOttawa · 1 earlier name | 1905–1990 | Midland States Bank |
| Union Bank/WestMacomb · 2 earlier names | 1909–2004 | Midland States Bank |
| Union Federal Savings and Loan Association of Cook CountyMatteson | 1901–1982 | Citibank, National Association |
| Union National Bank of ChicagoChicago | 1950–1983 | State Bank of Texas |
| Union Savings and Loan AssociationCollinsville | 1923–1983 | First Bank |
| United Bank of BelvidereBelvidere · 1 earlier name | 1884–1988 | PNC Bank, National Association |
| United Bank of Loves ParkLoves Park · 2 earlier names | 1953–1987 | PNC Bank, National Association |
| United Bank of RockfordRockford · 2 earlier names | 1969–1986 | PNC Bank, National Association |
| United Bank of SouthgateRockford · 1 earlier name | 1969–1987 | PNC Bank, National Association |
| United Bank, S.B.Springfield · 1 earlier name | 1874–1995 | Security Bank, s.b. |
| United Community BankGillespie · 1 earlier name | 1922–1994 | United Community Bank |
| United Community BankOakwood · 1 earlier name | 1907–2015 | First Farmers Bank & Trust Co. |
| United Community Bank Bunker HillBunker Hill · 1 earlier name | 1913–1994 | United Community Bank |
| United Community Bank - GreenfieldGreenfield · 1 earlier name | 1907–1994 | United Community Bank |
| United Community Bank of LisleLisle | 2000–2007 | U.S. Bank National Association |
| United Community Bank *Pawnee*Pawnee · 1 earlier name | 1943–1989 | United Community Bank |
| United Illinois Bank of CobdenCobden · 2 earlier names | 1900–1989 | U.S. Bank National Association |
| United Illinois Bank of CollinsvilleCollinsville · 1 earlier name | 1891–1991 | U.S. Bank National Association |
| United Illinois Bank of DahlgrenDahlgren · 1 earlier name | 1948–1989 | U.S. Bank National Association |
| United Illinois Bank of New AthensNew Athens · 1 earlier name | 1900–1991 | U.S. Bank National Association |
| United Illinois Bank of Southern IllinoisBenton · 2 earlier names | 1957–1992 | U.S. Bank National Association |
| United Illinois Bank of Southern IllinoisBenton · 1 earlier name | 1976–1995 | U.S. Bank National Association |
| United Illinois Bank of TroyTroy · 1 earlier name | 1948–1988 | U.S. Bank National Association |
| United of America BankChicago | 1962–1984 | Fifth Third Bank, National Association |
| United Savings and Loan AssociationChicago | 1921–1982 | JPMorgan Chase Bank, National Association |
| United Savings and Loan AssociationPalestine | 1952–1978 | Midland States Bank |
| United Savings and Loan AssociationWatseka | 1923–1980 | PNC Bank, National Association |
| United Savings and Loan Association of TroyTroy | 1928–1980 | First Bank |
| United Savings of AmericaChicago | 1887–1991 | JPMorgan Chase Bank, National Association |
| United Savings of Central IllinoisPeoria | 1919–1982 | Associated Bank, National Association |
| Unity Savings AssociationSchaumburg | 1957–1982 | Bank of America, National Association |
| Unity Savings of Park ForestPark Forest | 1883–1977 | JPMorgan Chase Bank, National Association |
| Universal Federal Savings BankChicago · 1 earlier name | 1923–2002 | Byline Bank |
| University Federal Savings and Loan AssociationChampaign | 1919–1976 | PNC Bank, National Association |
| University National BankChicago | 1919–2006 | First Financial Bank |
| University National Bank of PeoriaPeoria | 1954–1989 | PNC Bank, National Association |
| Upper Avenue BankChicago · 1 earlier name | 1929–1981 | JPMorgan Chase Bank, National Association |
| Uptown Federal Savings and Loan Association of ChicagoChicago | 1940–1988 | Citibank, National Association |
| Uptown National Bank of ChicagoChicago | 1929–2003 | Old National Bank |
| Urbana Savings and Loan AssociationUrbana | 1887–1982 | First Mid Bank & Trust, National Association |
| Urban Partnership BankChicago | 2010–2019 | Providence Bank & Trust |
| Valley BankMoline · 1 earlier name | 1911–2014 | Great Southern Bank |
| Valley Bank of Coal ValleyCoal Valley · 1 earlier name | 1971–1987 | Blackhawk Bank & Trust |
| Valley Community BankSaint Charles | 1996–2011 | First State Bank |
| Vandalia Citizens Savings and Loan AssociationVandalia | 1920–1982 | First Bank |
| Villa Grove Building and Loan AssociationVilla Grove | 1904–1981 | PNC Bank, National Association |
| Villa Park Trust & Savings BankVilla Park | 1923–2005 | BMO Bank National Association |
| Wabash Savings BankMount Carmel · 1 earlier name | 1890–2023 | The First National Bank of Allendale |
| Washington Federal Bank For SavingsChicago · 2 earlier names | 1913–2017 | Peoples Bank |
| Washington Federal Savings and Loan Association of Tazewell CoWashington | 1910–1983 | Heartland Bank and Trust Company |
| Washington National Bank of ChicagoChicago | 1977–1984 | Popular Bank |
| Water Tower BankChicago · 1 earlier name | 1974–1999 | Popular Bank |
| Wauconda National Bank and Trust CompanyWauconda · 1 earlier name | 1948–1995 | Fifth Third Bank, National Association |
| Waukegan Savings BankWaukegan · 2 earlier names | 1924–2012 | Old National Bank |
| Wayne County Bank and Trust CompanyFairfield | 1957–1995 | Peoples National Bank , N.A. |
| Wayne Savings and Loan AssociationFairfield | 1888–1983 | First Financial Bank, National Association |
| Weldon State Bank & TrustWeldon · 1 earlier name | 1945–2000 | First Mid Bank & Trust, National Association |
| Wells Fargo Bank Illinois, National AssociationGalesburg · 3 earlier names | 1863–2004 | Wells Fargo Bank, National Association |
| Wemple State BankWaverly | 1877–2012 | Peoples Bank & Trust |
| Wenona State BankWenona | 1934–2021 | Eureka Savings Bank |
| Western Federal Savings and Loan AssociationChicago | 1991–1992 | Devon Bank |
| Western Savings and Loan AssociationChicago | 1926–1991 | Devon Bank |
| Western Springs National Bank and TrustWestern Springs · 2 earlier names | 1916–2011 | Heartland Bank and Trust Company |
| Westfield State BankWestfield | 1947–1994 | Regions Bank |
| Westinghouse Federal Bank, A Federal Savings BankGalesburg · 2 earlier names | 1882–1993 | Associated Bank, National Association |
| West Jefferson BankTroy Township | 1973–1984 | First American Bank |
| West Pointe Bank and Trust CompanyBelleville | 1990–2006 | Commerce Bank |
| West Suburban BankLombard | 1962–2021 | Old Second National Bank |
| West Suburban Bank of Aurora, F.S.B.Aurora · 3 earlier names | 1926–1997 | Old Second National Bank |
| West Suburban Bank of Carol Stream/Stratford SquareBloomingdale · 1 earlier name | 1975–1997 | Old Second National Bank |
| West Suburban Bank of DarienDarien · 1 earlier name | 1973–1997 | Old Second National Bank |
| West Suburban Bank of Downers Grove/LombardDowners Grove · 1 earlier name | 1972–1997 | Old Second National Bank |
| West Town Bank & TrustNorth Riverside · 2 earlier names | 1922–2024 | Capital Bank, National Association |
| Wheatland BankNaperville | 2007–2010 | Wheaton Bank & Trust, National Association |
| Wheeling Trust and Savings BankWheeling | 1921–1984 | Fifth Third Bank, National Association |
| White County BankCarmi | 1904–2000 | Old National Bank |
| White Hall BankWhite Hall · 1 earlier name | 1904–2012 | Peoples Bank & Trust |
| Winchester National BankWinchester · 1 earlier name | 1886–1993 | First Bank |
| Windsor State BankWindsor | 1944–1987 | Shelby County State Bank |
| Winfield Community BankWinfield | 2000–2015 | Grand Ridge National Bank |
| Winnetka Savings and Loan AssociationWinnetka | 1886–1981 | Citibank, National Association |
| Woodford County BankEl Paso | 1900–1997 | Heartland Bank and Trust Company |
| Woodhull State BankWoodhull | 1976–1990 | Wells Fargo Bank, National Association |
| World Savings Bank Interim, National Association (IL)Westchester | 2007–2007 | Wells Fargo Bank, National Association |
| Worth Federal Savings and Loan AssociationWorth | 1905–1983 | JPMorgan Chase Bank, National Association |
| Wyoming Bank & Trust Co.Wyoming | 1935–2006 | Better Banks |
| York State BankElmhurst · 1 earlier name | 1927–1995 | U.S. Bank National Association |
Listed under each bank's last legal name; search finds earlier names too. See also bank branches open in Illinois.