| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Dacotah Bank | Bank | 1 | $256.4M | 53.78% |
| 2 | First Savings Bank | Bank | 1 | $82.9M | 17.38% |
| 3 | Minnwest Bank | Bank | 2 | $64.0M | 13.43% |
| 4 | First Interstate Bank | Bank | 1 | $30.0M | 6.30% |
| 5 | Wells Fargo Bank, National Association | Bank | 1 | $24.1M | 5.05% |
| 6 | Coteau Valley Federal Credit Union | Credit union | 2 | $16.9M* | 3.54% |
| 7 | Sisseton-Wahpeton Federal Credit Union | Credit union | 1 | $2.5M* | 0.52% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2025 | $476.7M | 7 | 9 | Dacotah Bank | 53.8% | 3,453 |
| 2024 | $496.1M | 7 | 9 | Dacotah Bank | 55.7% | 3,607 |
| 2023 | $471.1M | 7 | 9 | Dacotah Bank | 53.0% | 3,379 |
| 2022 | $481.5M | 7 | 8 | Dacotah Bank | 53.8% | 3,451 |
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