Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| Security Bank, s.b. | Springfield, IL | 01-01-1906 | $256,719 | BK |
| ILLIANA FINANCIAL | Calumet City, IL | 01-01-1936 | $253,524 | CU |
| BankChampaign, National Association | Champaign, IL | 03-14-1977 | $251,901 | BK |
| The Clay City Banking Co. | Clay City, IL | 07-05-1892 | $250,704 | BK |
| Raritan State Bank | Raritan, IL | 01-01-1920 | $249,367 | BK |
| Security Savings Bank | Monmouth, IL | 01-01-1882 | $247,592 | BK |
| West Central Bank | Ashland, IL | 06-12-1933 | $246,489 | BK |
| ILLINOIS STATE | Normal, IL | 01-01-1960 | $242,116 | CU |
| Crossroads Bank | Effingham, IL | 03-12-1974 | $237,171 | BK |
| The Anna -Jonesboro National Bank | Anna, IL | 01-01-1900 | $235,509 | BK |
| Bank of Farmington | Farmington, IL | 01-01-1903 | $234,829 | BK |
| Warren-Boynton State Bank | New Berlin, IL | 08-29-1877 | $231,029 | BK |
| First Federal Savings and Loan Association of Central Illinois, S.B. | Shelbyville, IL | 01-01-1906 | $225,118 | BK |
| STALEY | DECATUR, IL | 01-01-1930 | $222,120 | CU |
| ENCURAGE FINANCIAL NETWORK | Chicago, IL | 01-01-1936 | $221,724 | CU |