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Bank Deposits in Rock County, Wisconsin
Where bank deposits are booked in Rock County - FDIC Summary of Deposits, June 30, 2026.
Total bank deposits
$3.45B
Bank offices
34
Banks present
18
Top 4 banks' share
54.3%
Deposit market share in Rock County
| # | Bank | Branch deposits here | Share |
|---|---|---|---|
| 1 | Bmo Bank National Association | $522.22M | 15.1% |
| 2 | Johnson Bank | $495.45M | 14.3% |
| 3 | Bank First, N.A. | $480.70M | 13.9% |
| 4 | Associated Bank, National Association | $375.85M | 10.9% |
| 5 | First Mid Bank & Trust, National Association | $359.00M | 10.4% |
| 6 | Jpmorgan Chase Bank, National Association | $267.91M | 7.8% |
| 7 | Bank Of Milton | $193.70M | 5.6% |
| 8 | Lake Ridge Bank | $149.65M | 4.3% |
| 9 | First Community Bank | $141.77M | 4.1% |
| 10 | The Bank Of Brodhead | $99.88M | 2.9% |
| 11 | Old National Bank | $96.37M | 2.8% |
| 12 | Town Bank, National Association | $76.31M | 2.2% |
| 13 | U.S. Bank National Association | $59.93M | 1.7% |
| 14 | Bank Cmg | $42.13M | 1.2% |
| 15 | Cbi Bank & Trust | $38.74M | 1.1% |
| 16 | Premierbank | $27.97M | 0.8% |
| 17 | Farmers And Merchants Union Bank | $19.53M | 0.6% |
| 18 | Sauk Valley Bank & Trust Company | $6.37M | 0.2% |
Credit unions with branches in Rock County
- Blackhawk Community - 7 branches
- Advia - 3 branches
- First Community Cu Of Beloit - 3 branches
- Educators - 2 branches
- Heartland - 1 branch
- Teachers - 1 branch
- Summit - 1 branch
Credit unions do not report deposits by branch, so only bank deposits are ranked above.
Deposits are booked at the branch office that holds them (FDIC Summary of Deposits), which is not always where the depositor lives - online banks concentrate deposits at a few offices.
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