Illinois has about 240 different credit unions with ALLIANT CREDIT UNION being the largest credit union in Illinois having more than $18.04 billion in total assets and over 734,595 members.
| Name | Membership | Total Assets |
|---|---|---|
| 1ST MIDAMERICA CREDIT UNION731 E Bethalto Dr BETHALTO, IL 62010 | State chartered natural person | $942,109,420 |
| 2 RIVERS AREA CREDIT UNION296 W Jeffery St KANKAKEE, IL 60901 | State chartered natural person | $24,898,850 |
| 77TH STREET DEPOT FEDERAL CREDIT UNION5401 S Wentworth Ave Ste 26 CHICAGO, IL 60609-6300 | Multiple common bond - Primarily transportation | $21,487,131 |
| A.A.E.C. CREDIT UNION1104 S Arlington Heights Rd ARLINGTON HEIGHTS, IL 60005-3141 | State chartered natural person | $102,183,476 |
| A.S.H. EMPLOYEES CREDIT UNION1000 N MAIN ST ANNA, IL 62906-1652 | State chartered natural person | $5,164,740 |
| ABBOTT LABORATORIES CREDIT UNION325 Tri State Pkwy GURNEE, IL 60031 | State chartered natural person | $1,023,891,512 |
| ABRI CREDIT UNION1350 W Renwick Rd ROMEOVILLE, IL 60446-5345 | State chartered natural person | $403,963,580 |
| ACCESS CREDIT UNION1807 W Cermak Rd BROADVIEW, IL 60155 | State chartered natural person | $62,599,150 |
| ACME CONTINENTAL CREDIT UNION13601 S Perry Ave RIVERDALE, IL 60827-1655 | State chartered natural person | $59,326,238 |
| ADM CREDIT UNION3695 E William Street Rd DECATUR, IL 62521 | State chartered natural person | $16,647,951 |
| ADVANTAGE ONE CREDIT UNION204 N Jackson St MORRISON, IL 61270 | State chartered natural person | $26,348,993 |
| ALDERSGATE FEDERAL CREDIT UNION304 Lingale Ave MARION, IL 62959 | Associational - Religious, other than those designated 'low-income' | $8,697,008 |
| ALLIANT CREDIT UNION11545 W Touhy Ave CHICAGO, IL 60666 | State chartered natural person | $18,036,632,361 |
| ALTON MUNICIPAL EMPLOYEES FEDERAL CREDIT UNION3212 College Ave ALTON, IL 62002-4750 | Federal, State, Local Government | $497,052 |
| ALTONIZED COMMUNITY FEDERAL CREDIT UNION4435 ALBY ST ALTON, IL 62002-5916 | Community credit unions, urban or rural, other than those designated 'low income' | $54,622,068 |
| AMBRAW FEDERAL CREDIT UNION2300 Lexington Ave LAWRENCEVILLE, IL 62439 | Community credit unions, urban or rural, other than those designated 'low income' | $16,019,447 |
| ANCO COMMUNITY CREDIT UNION154 3rd St LA SALLE, IL 61301-2312 | State chartered natural person | $12,384,670 |
| ARCHER HEIGHTS CREDIT UNION6554 W Archer Ave CHICAGO, IL 60638 | State chartered natural person | $22,856,479 |
| AREA EDUCATIONAL CREDIT UNION812 CHARLESTON AVE MATTOON, IL 61938 | State chartered natural person | $30,443,712 |
| AURORA FIREFIGHTERS' CREDIT UNION88 N LaSalle St AURORA, IL 60505-3333 | State chartered natural person | $2,512,270 |