| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | BankWest, Inc. | Bank | 5 | $671.5M | 36.84% |
| 2 | American Bank & Trust | Bank | 1 | $392.2M | 21.52% |
| 3 | First National Bank | Bank | 2 | $303.8M | 16.67% |
| 4 | First Dakota National Bank | Bank | 1 | $186.4M | 10.23% |
| 5 | Wells Fargo Bank, National Association | Bank | 1 | $114.4M | 6.28% |
| 6 | Black Hills Federal Credit Union | Credit union | 1 | $101.4M* | 5.57% |
| 7 | Oahe Federal Credit Union | Credit union | 2 | $37.6M* | 2.06% |
| 8 | Dakota Plains Federal Credit Union | Credit union | 1 | $15.2M* | 0.83% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $1.82B | 8 | 14 | BankWest, Inc. | 36.8% | 2,278 |
| 2025 | $1.71B | 8 | 14 | BankWest, Inc. | 36.6% | 2,303 |
| 2024 | $1.65B | 9 | 15 | BankWest, Inc. | 36.1% | 2,197 |
| 2023 | $1.65B | 9 | 14 | BankWest, Inc. | 34.8% | 2,124 |
| 2022 | $1.68B | 9 | 14 | BankWest, Inc. | 36.6% | 2,164 |
Every institution above links to its profile — ratios, peer medians and this quarter’s change signals. Pro adds the full table, share movement and CSV export.