Bank Branches › Closed and merged banks › Wisconsin › M&I Marshall and Ilsley Bank
What happened to M&I Marshall and Ilsley Bank?
M&I Marshall and Ilsley Bank in Milwaukee, WI (earlier called Marshall and Ilsley Bank and 1 other name) merged into Harris National Association of Chicago, IL on Jul 5, 2011. That bank is now called BMO Bank National Association (Chicago, IL).
The chain, step by step
From the day it opened to the bank at the end of the chain today. Each step is one entry in the FDIC's record.
- 1847Marshall and Ilsley Bank opens in Milwaukee, WI
- May 4, 1972renamed M&I Marchall and Ilsley Bank
- laterrenamed M&I Marshall and Ilsley Bank
- Jul 5, 2011MERGEDM&I Marshall and Ilsley Bank merged into Harris National Association of Chicago, IL.FDIC certificate 1020 ends; its business continues under certificate 16571.
- TodayOPEN
BMO Bank National AssociationMain office Chicago, IL · FDIC certificate 16571 · 988 offices in 23 states on June 30, 2026Every BMO Bank National Association office → Website on file with the FDIC: www.bmo.com
If you still have something from M&I Marshall and Ilsley Bank
A lien that was never released
If a paid-off mortgage, home-equity line or car loan still shows M&I Marshall and Ilsley Bank as lienholder, start with BMO Bank National Association. In a merger the surviving bank takes over the other bank's loans, so it is the bank to ask for a recordable lien release; if the loan was sold along the way, it can tell you to whom.
The FDIC says it cannot process lien releases for banks that merged or were acquired without government assistance, which is what the record shows here.
Record the release with the same county office that recorded the original mortgage or deed of trust.
An old account, passbook or CD
Ask BMO Bank National Association to search for the account under the name M&I Marshall and Ilsley Bank. A passbook or certificate shows an account existed. It doesn't show the money is still there, and the OCC notes that federal rules require banks to keep most account records for five years.
Accounts nobody touches are eventually turned over to a state. The OCC puts the usual wait at three to five years with no activity, set by each state's law. Search the unclaimed-property program of the state of the owner's last known address on the bank's records, and any other state they lived in. It is free to search and to claim through a state's own site, and MissingMoney.com, an official site of the state administrators' association, searches most states at once.
A safe deposit box
Ask BMO Bank National Association which branch now holds boxes from the M&I Marshall and Ilsley Bank office you used. The OCC says a box with no activity for three to five years (the period is set by state statute) is likely treated as dormant, and its contents may be turned over to the state's unclaimed-property program.
Box contents are not covered by FDIC insurance.
Not sure this is your bank?
Many banks shared a name. Match the city and the years above against your paperwork, or search again with the town.
Credit unions were never FDIC-insured and are not in this record; the NCUA credit union lookup covers those. Banks that closed before about 1970 are not in the FDIC's list either.
One caution: banks also sell single branches. If the office you used was sold to a different bank along the way, the account went with the branch, not with this chain. The office list below shows which bank each office reports under now.
This page is drawn from FDIC records and federal guidance. It is not legal advice, and BankBranches is not a bank or a government office. More detail: lien releases · old passbooks and CDs · safe deposit boxes · unclaimed money.
Where the guidance comes from ▾
Its offices in the FDIC deposit reports
479 offices filed under this charter in some year from 1994 on. 274 are still open as of June 30, 2026. Showing 40.
| Office | Now |
|---|---|
| 320 E Lake StMinneapolis, MN | OpenBMO Bank National Association |
| 135 N Pennsylvania StIndianapolis, IN | OpenBMO Bank National Association |
| 1 W Main StMadison, WI | OpenBMO Bank National Association |
| 500 N 3rd StWausau, WI | OpenBMO Bank National Association |
| 51 East Camelback RoadPhoenix, AZ | OpenBMO Bank National Association |
| 2301 S Kingshighway BlvdSaint Louis, MO | OpenBMO Bank National Association |
| 501 E Kennedy Blvd, Ste 175Tampa, FL | OpenBMO Bank National Association |
| 310 W Walnut StGreen Bay, WI | OpenBMO Bank National Association |
| 3155 N 124th StBrookfield, WI | OpenBMO Bank National Association |
| 14850 N Scottsdale Rd, Ste 300Scottsdale, AZ | OpenBMO Bank National Association |
| 5454 S 76th StGreendale, WI | OpenBMO Bank National Association |
| 216 Price PlMadison, WI | OpenBMO Bank National Association |
| 11301 Nall AveLeawood, KS | OpenBMO Bank National Association |
| 7501 W North AveWauwatosa, WI | OpenBMO Bank National Association |
| 221 W College AveAppleton, WI | OpenBMO Bank National Association |
| 177 E Silver Spring DrWhitefish Bay, WI | OpenBMO Bank National Association |
| N82W15415 Appleton AvenueMenomonee Falls, WI | OpenBMO Bank National Association |
| 7447 University AveMiddleton, WI | OpenBMO Bank National Association |
| 1425 W Mequon RdMequon, WI | OpenBMO Bank National Association |
| 52 S Lemon AveSarasota, FL | OpenBMO Bank National Association |
| W62n209 Washington AveCedarburg, WI | OpenBMO Bank National Association |
| 900 Elm Grove RdElm Grove, WI | OpenBMO Bank National Association |
| 321 N Main StWest Bend, WI | OpenBMO Bank National Association |
| 101 W 4th StMarshfield, WI | OpenBMO Bank National Association |
| 13205 Manchester RdDes Peres, MO | OpenBMO Bank National Association |
| 19428 N R H Johnson BlvdSun City West, AZ | OpenBMO Bank National Association |
| 8740 N Port Washington RdFox Point, WI | OpenBMO Bank National Association |
| 8900 S Howell AveOak Creek, WI | OpenBMO Bank National Association |
| 2225 N Calhoun RdBrookfield, WI | OpenBMO Bank National Association |
| 6625 Lyndale Ave SRichfield, MN | OpenBMO Bank National Association |
| 5775 Wayzata BlvdMinneapolis, MN | OpenBMO Bank National Association |
| 7801 Mineral Point RdMadison, WI | OpenBMO Bank National Association |
| 300 E Wall StEagle River, WI | OpenBMO Bank National Association |
| S69w15563 Janesville RdMuskego, WI | OpenBMO Bank National Association |
| 5256 S Lindbergh BlvdSt. Louis, MO | OpenBMO Bank National Association |
| 859 E Green Bay AveSaukville, WI | OpenBMO Bank National Association |
| 15450 W National AveNew Berlin, WI | OpenBMO Bank National Association |
| W156n11150 Pilgrim RdGermantown, WI | OpenBMO Bank National Association |
| 868 S Main StWest Bend, WI | OpenBMO Bank National Association |
| 4613 Monona DrMonona, WI | OpenBMO Bank National Association |
Banks folded into M&I Marshall and Ilsley Bank
45 banks merged directly into this charter; counting the banks those had absorbed earlier, 205 charters end up inside it.
| Bank | Ended |
|---|---|
| Southwest Bank, An M&I BankSaint Louis, MO | Jul 1, 2010 |
| First Indiana Bank, National AssociationIndianapolis, IN | Feb 2, 2008 |
| Excel Bank MinnesotaMinneapolis, MN | Aug 1, 2007 |
| United Heritage BankOrlando, FL | Jun 27, 2007 |
| Gold BankLeawood, KS | Apr 3, 2006 |
| Southwest Bank of PhoenixPhoenix, AZ | Feb 1, 2003 |
| Richfield Bank & Trust Co.Richfield, MN | Jun 1, 2002 |
| Century Bank, National AssociationEden Prairie, MN | Jun 1, 2002 |
| National City Bank of MinneapolisMinneapolis, MN | Nov 1, 2001 |
| M&I Thunderbird BankPhoenix, AZ | Jun 1, 2001 |
| M&I Bank of Southern WisconsinMadison, WI | Jun 1, 2001 |
| M&I Bank SouthJanesville, WI | May 1, 2001 |
| M&I Bank South CentralWatertown, WI | May 1, 2001 |
| M&I Bank of MayvilleMayville, WI | May 1, 2001 |
| M&I Bank of La CrosseLa Crosse, WI | May 1, 2001 |
| M&I Community State BankEau Claire, WI | May 1, 2001 |
| M&I Mid-State BankStevens Point, WI | Apr 1, 2001 |
| M&I BankSuperior, WI | Apr 1, 2001 |
| M&I Bank of AshlandAshland, WI | Apr 1, 2001 |
| M&I First American BankWausau, WI | Apr 1, 2001 |
| M&I Citizens American BankMerrill, WI | Apr 1, 2001 |
| M&I Merchants BankRhinelander, WI | Apr 1, 2001 |
| M&I Central Bank & TrustMarshfield, WI | Apr 1, 2001 |
| M&I Bank of Eagle RiverEagle River, WI | Apr 1, 2001 |
| M&I Central State BankOshkosh, WI | Mar 1, 2001 |
| M&I Bank of ShawanoShawano, WI | Mar 1, 2001 |
| M&I Bank Fox ValleyAppleton, WI | Mar 1, 2001 |
| M&I Bank NortheastGreen Bay, WI | Mar 1, 2001 |
| M&I Bank of BurlingtonBurlington, WI | Feb 1, 2001 |
| M&I First National BankWest Bend, WI | Feb 1, 2001 |
| M&I Bank of RacineRacine, WI | Feb 1, 2001 |
| M&I Northern BankBrookfield, WI | Feb 1, 2001 |
| M&I Bank of Menomonee FallsMenomonee Falls, WI | Feb 1, 2001 |
| M&I Lake Country BankHartland, WI | Feb 1, 2001 |
| M & I Lakeview BankSheboygan, WI | Nov 1, 2000 |
| Security Bank, S.S.B.Milwaukee, WI | Oct 1, 1997 |
| M&I South Shore BankCudahy, WI | Oct 1, 1995 |
| Valley BankWauwatosa, WI | Aug 1, 1994 |
| M&I Wauwatosa State BankWauwatosa, WI | Aug 1, 1994 |
| M&I Greater Milwaukee BankMilwaukee, WI | Aug 1, 1994 |
| M&I Bay View State BankMilwaukee, WI | Apr 1, 1987 |
| M&I Silver Spring BankMilwaukee, WI | Mar 1, 1987 |
| M&I Bank of GreenfieldGreenfield, WI | Mar 1, 1987 |
| Heritage BankWauwatosa, WI | Dec 1, 1985 |
| Milwaukee County BankWest Allis, WI | Jan 1, 1985 |
Source: FDIC BankFind institution and history records, read Nov 15, 2026. The FDIC's list covers banks that ended in about 1970 or later. Look up certificate 1020 in the FDIC BankFind Suite to see the government's own entry. Corrections: me@byclaude.net.