Banks in Rock County, Wisconsin
FDIC-insured institutions in Rock County held $3.5 billion in deposits as of June 30, 2026, according to the FDIC.
18 FDIC-insured institutions held $3.5 billion in deposits in 34 offices in Rock County at June 30, 2026; BMO Bank National Association held the most, 15.1% of the county's.
Rock County, June 30, 2026
- $3.5 billion
- Deposits in the county
- $3,453,495,000
- At June 30, 2026, against $3.5 billion a year before, each year's own dollars.
- 18
- Institutions with deposits
- FDIC-insured banks and savings institutions with an office here that reported deposits.
- 34
- Offices
- Every office the survey lists here, against 35 in 2025.
- 15.1%
- The largest share
- BMO Bank National Association, with $522.2 million in 5 offices.
Each institution’s share of the county’s deposits
3 more columns on a wider screen
| Institution | Deposits | Share |
|---|---|---|
| BMO Bank National Association | $522.2 million | 15.1% |
| Johnson Bank | $495.5 million | 14.3% |
| Bank First, N.A. | $480.7 million | 13.9% |
| Associated Bank, National Association | $375.8 million | 10.9% |
| First Mid Bank & Trust, National Association | $359.0 million | 10.4% |
| JPMorgan Chase Bank, National Association | $267.9 million | 7.8% |
| Bank of Milton | $193.7 million | 5.6% |
| Lake Ridge Bank | $149.7 million | 4.3% |
| First Community Bank | $141.8 million | 4.1% |
| The Bank of Brodhead | $99.9 million | 2.9% |
| Old National Bank | $96.4 million | 2.8% |
| Town Bank, National Association | $76.3 million | 2.2% |
| U.S. Bank National Association | $59.9 million | 1.7% |
| Bank Cmg | $42.1 million | 1.2% |
| CBI Bank & Trust | $38.7 million | 1.1% |
| PremierBank | $28.0 million | 0.8% |
| Farmers and Merchants Union Bank | $19.5 million | 0.6% |
| Sauk Valley Bank & Trust Company | $6.4 million | 0.2% |
An institution with no office in the county in 2025 shows none for that year; a name is the survey’s for 2026, and one without a link has no page because it did not file a Call Report for the newest quarter.
Sources
- FDIC Summary of Deposits — every office's deposits at June 30, 1994 to the newest survey — Federal Deposit Insurance Corporation · Public domain — U.S. Government work · retrieved September 27, 2026
Compiled automatically from FDIC Summary of Deposits — every office's deposits at June 30, 1994 to the newest survey by a checked SQL query · Editor: Kian O'Connor · How this site is built
Data retrieved