Every FDIC-insured bank branch in Washington County, Oklahoma as of June 30, 2025. County land area: 416 square miles, 4.1 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| Arvest Bank | 6 | $591.4M |
| Armstrong Bank | 2 | $46.5M |
| Gateway First Bank | 1 | $46.6M |
| RCB Bank | 1 | $26.7M |
| Union State Bank | 1 | $26.2M |
| BancFirst | 1 | $117.1M |
| American Bank of Oklahoma | 1 | $24.6M |
| Stride Bank, National Association | 1 | $13.2M |
| The City National Bank and Trust Company of Lawton, Oklahoma | 1 | $2.0M |
| American Heritage Bank | 1 | $31.4M |
| BOKF, National Association | 1 | $59.2M |