Banks in Rock County, Wisconsin
35 active bank branches operated by 18 institutions, per FDIC records.
Active branches
35
Banks present
18
Deposits (2026)
$3.5B
Closings since 2020
9
6 openings
Largest banks by deposits in Rock County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| BMO Bank | $522M | 15.1% | 5 |
| Johnson Bank | $495M | 14.3% | 2 |
| Bank First | $481M | 13.9% | 4 |
| Associated Bank | $376M | 10.9% | 2 |
| First Mid Bank & Trust | $359M | 10.4% | 3 |
| Chase Bank | $268M | 7.8% | 2 |
| Bank of Milton | $194M | 5.6% | 2 |
| Lake Ridge Bank | $150M | 4.3% | 2 |
| First Community Bank | $142M | 4.1% | 1 |
| The Bank of Brodhead | $100M | 2.9% | 2 |
Deposit location reflects the office to which deposits are reported and may not represent the residence of depositors.
Cities and towns
Transcribed from FDIC BankFind Suite active-location records and the annual Summary of Deposits. County assignment follows the FDIC branch record.