Banks in Jefferson County, Wisconsin
23 active bank branches operated by 11 institutions, per FDIC records.
Active branches
23
Banks present
11
Deposits (2025)
$1.9B
Closings since 2020
3
1 openings
Largest banks by deposits in Jefferson County (2025)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Ixonia Bank | $401M | 20.8% | 3 |
| PremierBank | $350M | 18.1% | 5 |
| Bank of Lake Mills | $326M | 16.9% | 2 |
| Bank Cmg | $179M | 9.3% | 2 |
| Associated Bank | $161M | 8.4% | 2 |
| BMO Bank | $145M | 7.5% | 1 |
| Badger Bank | $118M | 6.1% | 3 |
| Farmers & Merchants State Bank | $104M | 5.4% | 2 |
| Johnson Bank | $59M | 3% | 1 |
| Bank First | $56M | 2.9% | 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.