Banks in Monona County, Iowa
11 active bank branches operated by 9 institutions, per FDIC records.
Active branches
11
Banks present
9
Deposits (2026)
$402M
Closings since 2020
0
0 openings
Largest banks by deposits in Monona County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| United Bank of Iowa | $88M | 21.9% | 2 |
| The Security National Bank of Sioux City, Iowa | $75M | 18.7% | 1 |
| U.S. Bank | $56M | 13.9% | 1 |
| BankFirst | $47M | 11.8% | 1 |
| First Security Bank | $38M | 9.4% | 1 |
| Community Bank | $37M | 9.2% | 2 |
| Great Southern Bank | $27M | 6.6% | 1 |
| The Shelby County State Bank | $20M | 5% | 1 |
| Sloan State Bank | $14M | 3.5% | 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.