Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| BMO Bank National Association | Chicago, IL | 05-17-1947 | $253,742,866 | BK |
| The Northern Trust Company | Chicago, IL | 01-01-1889 | $171,309,876 | BK |
| CIBC Bank USA | Chicago, IL | 02-06-1991 | $60,355,912 | BK |
| ALLIANT | CHICAGO, IL | 01-01-1935 | $19,953,492 | CU |
| Busey Bank | Champaign, IL | 07-08-1946 | $18,866,438 | BK |
| Byline Bank | Chicago, IL | 03-01-1972 | $9,700,910 | BK |
| Wintrust Bank, National Association | Chicago, IL | 09-14-1994 | $9,563,900 | BK |
| Lake Forest Bank & Trust Company, National Association | Lake Forest, IL | 05-21-1986 | $9,544,049 | BK |
| CITIZENS EQUITY FIRST | Peoria, IL | 01-01-1937 | $8,172,997 | CU |
| First American Bank | Elk Grove Village, IL | 03-26-1901 | $8,108,777 | BK |
| First Mid Bank & Trust, National Association | Mattoon, IL | 02-08-1865 | $7,621,041 | BK |
| Midland States Bank | Effingham, IL | 01-01-1881 | $7,096,444 | BK |
| BAXTER | Vernon Hills, IL | 01-01-1980 | $6,178,656 | CU |
| Hinsdale Bank & Trust Company, National Association | Hinsdale, IL | 10-28-1993 | $5,731,680 | BK |
| Northbrook Bank and Trust Company, National Association | Northbrook, IL | 11-22-2000 | $5,710,461 | BK |