Banks in Butte County, South Dakota
3 active bank branches operated by 3 institutions, per FDIC records.
Active branches
3
Banks present
3
Deposits (2026)
$341M
Closings since 2020
1
0 openings
Largest banks by deposits in Butte County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Pioneer Bank & Trust | $209M | 61.5% | 1 |
| First Interstate Bank | $91M | 26.7% | 1 |
| First National Bank | $40M | 11.8% | 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.