Every FDIC-insured bank branch in Clinton County, Illinois as of June 30, 2025. County land area: 474 square miles, 4.9 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| Germantown Trust & Savings Bank | 4 | $415.2M |
| 1NB Bank | 4 | $248.2M |
| FCB Banks | 3 | $280.0M |
| Community Bank of Trenton | 2 | $109.2M |
| Regions Bank | 1 | $71.4M |
| Bank of Hillsboro, National Association | 1 | $77.1M |
| First FSB of Mascoutah | 1 | $23.8M |
| Dieterich Bank | 1 | $84.2M |
| The Bradford National Bank of Greenville | 1 | $3.4M |
| Peoples National Bank , N.A. | 1 | $84.1M |
| Midwest National Bank | 1 | $7.5M |
| Bank of Belleville | 1 | $17.0M |
| U.S. Bank National Association | 1 | $41.2M |
| Farmers State Bank of Hoffman | 1 | $101.9M |