Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| BMO Bank National Association | Chicago, IL | 05-17-1947 | $254,972,746 | BK |
| The Northern Trust Company | Chicago, IL | 01-01-1889 | $178,566,494 | BK |
| CIBC Bank USA | Chicago, IL | 02-06-1991 | $66,504,376 | BK |
| ALLIANT | CHICAGO, IL | 01-01-1935 | $20,006,669 | CU |
| Busey Bank | Champaign, IL | 07-08-1946 | $18,147,004 | BK |
| Byline Bank | Chicago, IL | 03-01-1972 | $9,909,436 | BK |
| Wintrust Bank, National Association | Chicago, IL | 09-14-1994 | $9,567,734 | BK |
| Lake Forest Bank & Trust Company, National Association | Lake Forest, IL | 05-21-1986 | $9,250,823 | BK |
| First Mid Bank & Trust, National Association | Mattoon, IL | 02-08-1865 | $9,142,999 | BK |
| First American Bank | Elk Grove Village, IL | 03-26-1901 | $8,626,339 | BK |
| CITIZENS EQUITY FIRST | Peoria, IL | 01-01-1937 | $8,499,986 | CU |
| Old Second National Bank | Aurora, IL | 11-21-1887 | $6,861,243 | BK |
| Hinsdale Bank & Trust Company, National Association | Hinsdale, IL | 10-28-1993 | $6,800,738 | BK |
| Heartland Bank and Trust Company | Bloomington, IL | 02-22-1971 | $6,721,503 | BK |
| Midland States Bank | Effingham, IL | 01-01-1881 | $6,691,838 | BK |