Banks in Sioux County, Iowa
21 active bank branches operated by 9 institutions, per FDIC records.
Active branches
21
Banks present
9
Deposits (2026)
$2.9B
Closings since 2020
2
1 openings
Largest banks by deposits in Sioux County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| American State Bank | $1.1B | 37.9% | 9 |
| Peoples Bank | $632M | 21.6% | 3 |
| Iowa State Bank | $457M | 15.6% | 3 |
| Premier Bank | $316M | 10.8% | 1 |
| The Security National Bank of Sioux City, Iowa | $156M | 5.3% | 1 |
| Northwest Bank | $98M | 3.3% | 1 |
| Primebank | $78M | 2.7% | 1 |
| Rivers Edge Bank | $61M | 2.1% | 1 |
| Citizens State Bank | $25M | 0.8% | 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.