Bank Branches › Wisconsin › Rock County › 100 N Main St
Full-service office · FDIC office no. 4171
BMO Bank National Association
100 N Main St, Janesville, WI 53545
Open · June 2026
$134M
deposits, 2026
1875
established
9th
of 34 in county
5
names on the sign
| Date | Bank on the sign | Deposits | Change |
|---|---|---|---|
| Jun 30 2026 | BMO Bank National Association | $134M | −3% |
| Jun 30 2025 | BMO Bank National Association | $138M | −8% |
| Jun 30 2024 | BMO Bank National AssociationNEW NAME | $151M | +10% |
| Jun 30 2023 | BMO Harris Bank National Association | $137M | −6% |
| Jun 30 2022 | BMO Harris Bank National Association | $146M | 0% |
| Jun 30 2021 | BMO Harris Bank National Association | $146M | 0% |
| Jun 30 2020 | BMO Harris Bank National Association | $145M | +32% |
| Jun 30 2019 | BMO Harris Bank National Association | $110M | −1% |
| Jun 30 2018 | BMO Harris Bank National Association | $111M | +3% |
| Jun 30 2017 | BMO Harris Bank National Association | $108M | 0% |
| Jun 30 2016 | BMO Harris Bank National Association | $108M | +10% |
| Jun 30 2015 | BMO Harris Bank National Association | $98.4M | −58% |
| Jun 30 2014 | BMO Harris Bank National Association | $235M | +62% |
| Jun 30 2013 | BMO Harris Bank National Association | $145M | +2% |
| Jun 30 2012 | BMO Harris Bank National AssociationNEW NAME | $142M | +9% |
| Jun 30 2011 | M&I Marshall and Ilsley Bank | $130M | −5% |
| Jun 30 2010 | M&I Marshall and Ilsley Bank | $137M | +12% |
| Jun 30 2009 | M&I Marshall and Ilsley Bank | $122M | 0% |
| Jun 30 2008 | M&I Marshall and Ilsley Bank | $123M | +4% |
| Jun 30 2007 | M&I Marshall and Ilsley Bank | $118M | +1% |
| Jun 30 2006 | M&I Marshall and Ilsley Bank | $116M | +5% |
| Jun 30 2005 | M&I Marshall and Ilsley Bank | $111M | +9% |
| Jun 30 2004 | M&I Marshall and Ilsley Bank | $101M | −5% |
| Jun 30 2003 | M&I Marshall and Ilsley Bank | $106M | +11% |
| Jun 30 2002 | M&I Marshall and Ilsley Bank | $96.0M | −12% |
| Jun 30 2001 | M&I Marshall and Ilsley BankNEW NAME | $109M | −36% |
| Jun 30 2000 | M&I Bank South | $170M | −6% |
| Jun 30 1999 | M&I Bank South | $182M | +11% |
| Jun 30 1998 | M&I Bank SouthNEW NAME | $164M | −1% |
| Jun 30 1997 | M&I Bank of Janesville | $166M | +11% |
| Jun 30 1996 | M&I Bank of Janesville | $150M | +23% |
| Jun 30 1995 | M&I Bank of Janesville | $122M | −15% |
| Jun 30 1994 | M&I Bank of Janesville | $143M | |
| 1875-10-18 | Office established (FDIC record) — 119 years before this passbook begins | ||
Nearest other open offices in Rock County
- 0.1 miJohnson Bank · 1 S Main St, Janesville
- 1.0 miFarmers and Merchants Union Bank · 1101 N Parker Dr, Janesville
- 1.1 miJPMorgan Chase Bank, National Association · 18 N Arch St, Janesville
- 1.5 miBMO Bank National Association · 1404 Creston Park Dr, Janesville
- 1.6 miPremierBank · 1400 Black Bridge Road, Janesville
- 1.8 miSauk Valley Bank & Trust Company · 2107 Foster Avenue, Suite 100, Janesville
- 2.2 miLake Ridge Bank · 2605 Kennedy Rd, Janesville
- 2.3 miFirst Mid Bank & Trust, National Association · 2525 Milton Ave, Janesville
All banks in Rock County →
Every BMO Bank National Association office →
Earlier names and banks folded into BMO Bank National Association →
Names on the sign
1994–1997M&I Bank of Janesville1998–2000M&I Bank South2001–2011M&I Marshall and Ilsley Bank2012–2023BMO Harris Bank National Association2024–nowBMO Bank National Association
The FDIC office number stays with the building when banks merge or rename, so the same office appears under each owner. Follow an earlier name to see what became of that bank.
Deposits are the balances the bank assigned to this office on June 30 of each year, in nominal dollars. Source: FDIC Summary of Deposits, office (UNINUMBR) 4171.