| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Black Hills Federal Credit Union | Credit union | 9 | $913.0M* | 20.04% |
| 2 | First Interstate Bank | Bank | 7 | $616.4M | 13.53% |
| 3 | Wells Fargo Bank, National Association | Bank | 3 | $565.6M | 12.41% |
| 4 | U.S. Bank National Association | Bank | 3 | $563.2M | 12.36% |
| 5 | Security First Bank | Bank | 2 | $373.8M | 8.20% |
| 6 | Black Hills Community Bank, N.A. | Bank | 1 | $364.7M | 8.00% |
| 7 | Pioneer Bank & Trust | Bank | 2 | $350.6M | 7.69% |
| 8 | Dacotah Bank | Bank | 1 | $196.7M | 4.32% |
| 9 | Sentinel Federal Credit Union | Credit union | 5 | $110.2M* | 2.42% |
| 10 | Aspen Federal Credit Union | Credit union | 2 | $101.8M* | 2.23% |
| 9 more institutions, year-over-year share and branch changes with Pro →$29/mo, cancel any time. | |||||
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $4.56B | 19 | 46 | Black Hills Federal Credit Union | 20.0% | 1,124 |
| 2025 | $4.54B | 19 | 46 | Black Hills Federal Credit Union | 19.9% | 1,121 |
| 2024 | $4.28B | 19 | 45 | Black Hills Federal Credit Union | 18.7% | 1,120 |
| 2023 | $4.54B | 19 | 46 | Black Hills Federal Credit Union | 22.1% | 1,211 |
| 2022 | $4.91B | 19 | 46 | Black Hills Federal Credit Union | 19.0% | 1,195 |
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.