Banks in Sioux County, Iowa
21 active bank branches operated by 9 institutions, per FDIC records.
Active branches
21
Banks present
9
Deposits (2025)
$2.8B
Closings since 2020
2
1 openings
Largest banks by deposits in Sioux County (2025)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| American State Bank | $1.1B | 40.3% | 9 |
| Peoples Bank | $563M | 20% | 3 |
| Iowa State Bank | $418M | 14.8% | 3 |
| Premier Bank | $295M | 10.5% | 1 |
| The Security National Bank of Sioux City, Iowa | $153M | 5.4% | 1 |
| Northwest Bank | $98M | 3.5% | 1 |
| Primebank | $73M | 2.6% | 1 |
| Rivers Edge Bank | $57M | 2% | 1 |
| Citizens State Bank | $26M | 0.9% | 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.