| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Prosperity Bank | Bank | 3 | $779.9M | 41.11% |
| 2 | The First State Bank | Bank | 4 | $338.6M | 17.85% |
| 3 | NewFirst National Bank | Bank | 4 | $273.3M | 14.41% |
| 4 | Texasgulf Federal Credit Union | Credit union | 2 | $189.3M* | 9.98% |
| 5 | First Financial Bank | Bank | 1 | $140.0M | 7.38% |
| 6 | Allegiance Bank | Bank | 2 | $76.2M | 4.02% |
| 7 | Zions Bancorporation, N.A. | Bank | 1 | $42.0M | 2.22% |
| 8 | The First National Bank of Eagle Lake | Bank | 1 | $28.6M | 1.51% |
| 9 | Matagorda County Credit Union | Credit union | 1 | $10.0M* | 0.53% |
| 10 | First National Bank Texas | Bank | 1 | $7.1M | 0.37% |
| 2 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 | $1.90B | 12 | 22 | Prosperity Bank | 41.1% | 2,394 |
| 2025 | $1.83B | 11 | 21 | Prosperity Bank | 42.1% | 2,452 |
| 2024 | $1.81B | 11 | 21 | Prosperity Bank | 41.5% | 2,440 |
| 2023 | $1.67B | 11 | 21 | Prosperity Bank | 39.3% | 2,302 |
| 2022 | $1.54B | 11 | 21 | Prosperity Bank | 37.5% | 2,276 |
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.