Banks in Mahaska County, Iowa
8 active bank branches operated by 7 institutions, per FDIC records.
Active branches
8
Banks present
7
Deposits (2026)
$589M
Closings since 2020
2
1 openings
Largest banks by deposits in Mahaska County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Nicolet National Bank | $216M | 36.7% | 1 |
| Bank Iowa | $158M | 26.9% | 2 |
| TruBank | $71M | 12.1% | 1 |
| Twin Cedars Bank | $44M | 7.5% | 1 |
| Great Southern Bank | $36M | 6.2% | 1 |
| First State Bank | $33M | 5.5% | 1 |
| Leighton State Bank | $30M | 5.2% | 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.