Every FDIC-insured bank branch in Washington County, Illinois as of June 30, 2025. County land area: 563 square miles, 2.3 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| The Farmers and Merchants National Bank of Nashville | 5 | $217.4M |
| The Bradford National Bank of Greenville | 2 | $67.5M |
| Murphy-Wall State Bank and Trust Company | 1 | $20.8M |
| Regions Bank | 1 | $40.9M |
| Nashville Savings Bank | 1 | $88.2M |
| The First National Bank of Okawville | 1 | $56.9M |
| The Old Exchange National Bank of Okawville | 1 | $73.6M |
| Farmers State Bank of Hoffman | 1 | $9.7M |