Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| BMO Bank National Association | Chicago, IL | 05-17-1947 | $265,657,813 | BK |
| The Northern Trust Company | Chicago, IL | 01-01-1889 | $150,251,927 | BK |
| CIBC Bank USA | Chicago, IL | 02-06-1991 | $54,847,358 | BK |
| ALLIANT | CHICAGO, IL | 01-01-1935 | $18,473,233 | CU |
| Busey Bank | Champaign, IL | 07-08-1946 | $12,254,786 | BK |
| Wintrust Bank, National Association | Chicago, IL | 09-14-1994 | $9,541,485 | BK |
| Byline Bank | Chicago, IL | 03-01-1972 | $8,870,356 | BK |
| Lake Forest Bank & Trust Company, National Association | Lake Forest, IL | 05-21-1986 | $8,066,255 | BK |
| Midland States Bank | Effingham, IL | 01-01-1881 | $7,858,917 | BK |
| First Mid Bank & Trust, National Association | Mattoon, IL | 02-08-1865 | $7,535,918 | BK |
| CITIZENS EQUITY FIRST | Peoria, IL | 01-01-1937 | $7,458,555 | CU |
| First American Bank | Elk Grove Village, IL | 03-26-1901 | $6,608,794 | BK |
| BAXTER | Vernon Hills, IL | 01-01-1980 | $5,895,173 | CU |
| Old Second National Bank | Aurora, IL | 11-21-1887 | $5,718,417 | BK |
| Morton Community Bank | Morton, IL | 08-26-1961 | $5,577,863 | BK |