Banks in Pennington County, South Dakota
23 active bank branches operated by 10 institutions, per FDIC records.
Active branches
23
Banks present
10
Deposits (2026)
$3.3B
Closings since 2020
6
1 openings
Largest banks by deposits in Pennington County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| First Interstate Bank | $616M | 18.8% | 7 |
| Wells Fargo | $566M | 17.3% | 3 |
| U.S. Bank | $563M | 17.2% | 3 |
| Security First Bank | $374M | 11.4% | 2 |
| Black Hills Community Bank | $365M | 11.1% | 1 |
| Pioneer Bank & Trust | $351M | 10.7% | 2 |
| Dacotah Bank | $197M | 6% | 1 |
| BankWest, Inc. | $101M | 3.1% | 2 |
| First National Bank | $99M | 3% | 1 |
| First Western Federal Savings Bank | $41M | 1.2% | 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.