Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| BMO Bank National Association | Chicago, IL | 05-17-1947 | $264,330,347 | BK |
| The Northern Trust Company | Chicago, IL | 01-01-1889 | $155,218,813 | BK |
| CIBC Bank USA | Chicago, IL | 02-06-1991 | $58,902,070 | BK |
| ALLIANT | CHICAGO, IL | 01-01-1935 | $20,336,454 | CU |
| Busey Bank | Champaign, IL | 07-08-1946 | $11,949,791 | BK |
| Wintrust Bank, National Association | Chicago, IL | 09-14-1994 | $9,579,552 | BK |
| Byline Bank | Chicago, IL | 03-01-1972 | $9,408,402 | BK |
| Lake Forest Bank & Trust Company, National Association | Lake Forest, IL | 05-21-1986 | $8,362,277 | BK |
| CITIZENS EQUITY FIRST | Peoria, IL | 01-01-1937 | $7,768,683 | CU |
| Midland States Bank | Effingham, IL | 01-01-1881 | $7,741,339 | BK |
| First Mid Bank & Trust, National Association | Mattoon, IL | 02-08-1865 | $7,505,477 | BK |
| First American Bank | Elk Grove Village, IL | 03-26-1901 | $7,266,384 | BK |
| BAXTER | Vernon Hills, IL | 01-01-1980 | $5,907,859 | CU |
| Old Second National Bank | Aurora, IL | 11-21-1887 | $5,668,681 | BK |
| Morton Community Bank | Morton, IL | 08-26-1961 | $5,573,576 | BK |