Banks in Union County, South Dakota
12 active bank branches operated by 9 institutions, per FDIC records.
Active branches
12
Banks present
9
Deposits (2026)
$773M
Closings since 2020
0
1 openings
Largest banks by deposits in Union County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Liberty National Bank | $242M | 31.3% | 4 |
| Premier Bank | $153M | 19.8% | 1 |
| First Savings Bank | $107M | 13.9% | 1 |
| Security National Bank of South Dakota | $89M | 11.5% | 1 |
| Central Bank | $56M | 7.3% | 1 |
| Pioneer Bank | $52M | 6.7% | 1 |
| First Dakota National Bank | $43M | 5.6% | 1 |
| Peoples Bank | $19M | 2.4% | 1 |
| 1st Financial Bank USA | $11M | 1.5% | 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.