| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Tri Counties Bank | Bank | 2 | $323.2M | 45.01% |
| 2 | Columbia Bank | Bank | 2 | $166.2M | 23.14% |
| 3 | First Northern Bank of Dixon | Bank | 2 | $85.3M | 11.88% |
| 4 | Sierra Central Credit Union | Credit union | 1 | $74.5M* | 10.37% |
| 5 | U.S. Bank National Association | Bank | 1 | $68.9M | 9.59% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $718.2M | 5 | 8 | Tri Counties Bank | 45.0% | 2,902 |
| 2025 | $701.7M | 5 | 8 | Tri Counties Bank | 46.3% | 3,009 |
| 2024 | $649.2M | 5 | 9 | Tri Counties Bank | 42.6% | 2,748 |
| 2023 | $679.9M | 5 | 9 | Tri Counties Bank | 44.2% | 2,823 |
| 2022 | $715.0M | 5 | 9 | Tri Counties Bank | 42.2% | 2,738 |
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.