Every FDIC-insured bank branch in Marion County, Illinois as of June 30, 2025. County land area: 573 square miles, 3.0 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| The Iuka State Bank | 3 | $93.6M |
| Community Partners Savings Bank | 2 | $137.1M |
| Peoples National Bank , N.A. | 2 | $316.9M |
| First Financial Bank, National Association | 2 | $42.1M |
| Midland States Bank | 1 | $86.2M |
| The Peoples State Bank of Newton, Illinois | 1 | $42.5M |
| The Bradford National Bank of Greenville | 1 | $37.1M |
| Kinmundy Bank | 1 | $59.0M |
| Midwest National Bank | 1 | $93.2M |
| The FNB Community Bank | 1 | $33.2M |
| U.S. Bank National Association | 1 | $62.6M |
| Farmers State Bank of Hoffman | 1 | $54.4M |