Banks in Union County, South Dakota
12 active bank branches operated by 9 institutions, per FDIC records.
Active branches
12
Banks present
9
Deposits (2025)
$757M
Closings since 2020
0
1 openings
Largest banks by deposits in Union County (2025)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Liberty National Bank | $239M | 31.6% | 4 |
| Premier Bank | $148M | 19.6% | 1 |
| First Savings Bank | $95M | 12.5% | 1 |
| Security National Bank of South Dakota | $84M | 11.2% | 1 |
| Pioneer Bank | $65M | 8.5% | 1 |
| Central Bank | $61M | 8.1% | 1 |
| First Dakota National Bank | $42M | 5.6% | 1 |
| Peoples Bank | $13M | 1.7% | 1 |
| 1st Financial Bank USA | $9M | 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.