| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Black Hills Federal Credit Union | Credit union | 11 | $1.12B* | 19.83% |
| 2 | First Interstate Bank | Bank | 10 | $987.6M | 17.55% |
| 3 | Wells Fargo Bank, National Association | Bank | 4 | $619.4M | 11.01% |
| 4 | U.S. Bank National Association | Bank | 3 | $563.2M | 10.01% |
| 5 | Pioneer Bank & Trust | Bank | 3 | $409.1M | 7.27% |
| 6 | Security First Bank | Bank | 2 | $373.8M | 6.64% |
| 7 | Black Hills Community Bank, N.A. | Bank | 1 | $364.7M | 6.48% |
| 8 | Dacotah Bank | Bank | 2 | $232.1M | 4.12% |
| 9 | Sentinel Federal Credit Union | Credit union | 7 | $154.2M* | 2.74% |
| 10 | Aspen Federal Credit Union | Credit union | 3 | $152.7M* | 2.71% |
| 12 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 | $5.63B | 22 | 63 | Black Hills Federal Credit Union | 19.8% | 1,111 |
| 2025 | $5.52B | 22 | 62 | Black Hills Federal Credit Union | 20.0% | 1,131 |
| 2024 | $5.18B | 22 | 60 | Black Hills Federal Credit Union | 19.3% | 1,142 |
| 2023 | $5.52B | 22 | 61 | Black Hills Federal Credit Union | 22.7% | 1,228 |
| 2022 | $5.78B | 22 | 59 | Black Hills Federal Credit Union | 20.7% | 1,202 |
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.