Banks in Pennington County, South Dakota
23 active bank branches operated by 10 institutions, per FDIC records.
Active branches
23
Banks present
10
Deposits (2025)
$3.2B
Closings since 2020
6
1 openings
Largest banks by deposits in Pennington County (2025)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| First Interstate Bank | $622M | 19.2% | 7 |
| U.S. Bank | $554M | 17.1% | 3 |
| Wells Fargo | $541M | 16.7% | 3 |
| Security First Bank | $400M | 12.4% | 2 |
| Black Hills Community Bank | $384M | 11.9% | 1 |
| Pioneer Bank & Trust | $346M | 10.7% | 2 |
| Dacotah Bank | $155M | 4.8% | 1 |
| First National Bank | $99M | 3.1% | 1 |
| BankWest, Inc. | $98M | 3% | 2 |
| First Western Federal Savings Bank | $38M | 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.