Banks in Rock County, Wisconsin
35 active bank branches operated by 18 institutions, per FDIC records.
Active branches
35
Banks present
18
Deposits (2025)
$3.4B
Closings since 2020
9
6 openings
Largest banks by deposits in Rock County (2025)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| BMO Bank | $532M | 15.7% | 5 |
| Bank First | $468M | 13.8% | 4 |
| Johnson Bank | $443M | 13.1% | 2 |
| First Mid Bank & Trust | $425M | 12.5% | 3 |
| Associated Bank | $380M | 11.2% | 2 |
| Chase Bank | $267M | 7.9% | 2 |
| Bank of Milton | $182M | 5.4% | 2 |
| Lake Ridge Bank | $139M | 4.1% | 2 |
| First Community Bank | $139M | 4.1% | 1 |
| Old National Bank | $91M | 2.7% | 1 |
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.