Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| BMO Bank National Association | Chicago, IL | 05-17-1947 | $263,653,406 | BK |
| The Northern Trust Company | Chicago, IL | 01-01-1889 | $154,947,706 | BK |
| CIBC Bank USA | Chicago, IL | 02-06-1991 | $61,517,047 | BK |
| ALLIANT | CHICAGO, IL | 01-01-1935 | $19,539,152 | CU |
| Busey Bank | Champaign, IL | 07-08-1946 | $12,011,325 | BK |
| Byline Bank | Chicago, IL | 03-01-1972 | $9,477,985 | BK |
| Wintrust Bank, National Association | Chicago, IL | 09-14-1994 | $9,436,117 | BK |
| Lake Forest Bank & Trust Company, National Association | Lake Forest, IL | 05-21-1986 | $8,463,081 | BK |
| CITIZENS EQUITY FIRST | Peoria, IL | 01-01-1937 | $7,911,421 | CU |
| Midland States Bank | Effingham, IL | 01-01-1881 | $7,519,030 | BK |
| First Mid Bank & Trust, National Association | Mattoon, IL | 02-08-1865 | $7,461,415 | BK |
| First American Bank | Elk Grove Village, IL | 03-26-1901 | $7,389,795 | BK |
| Northbrook Bank and Trust Company, National Association | Northbrook, IL | 11-22-2000 | $6,032,989 | BK |
| BAXTER | Vernon Hills, IL | 01-01-1980 | $6,018,343 | CU |
| Old Second National Bank | Aurora, IL | 11-21-1887 | $5,647,659 | BK |