| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Black Hills Federal Credit Union | Credit union | 1 | $100.6M* | 50.46% |
| 2 | First Interstate Bank | Bank | 1 | $70.6M | 35.41% |
| 3 | Wells Fargo Bank, National Association | Bank | 1 | $28.1M | 14.13% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2025 | $199.3M | 3 | 3 | Black Hills Federal Credit Union | 50.5% | 4,000 |
| 2024 | $229.0M | 3 | 4 | Black Hills Federal Credit Union | 43.7% | 3,968 |
| 2023 | $252.6M | 3 | 4 | Black Hills Federal Credit Union | 49.6% | 4,061 |
| 2022 | $278.1M | 3 | 4 | Black Hills Federal Credit Union | 47.8% | 4,039 |
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.