Illinois Intercollegiate Athletic Conference Membership Membership

| Institution | Location_ | Founded | Years_in_IIAC_approx_ | Team_Nickname |
|---|---|---|---|---|
| Carthage College | Kenosha, Wisconsin | 1847 | 1912–1941 | Red Men |
| Eastern Illinois University | Charleston, Illinois | 1895 | 1912–1970 | Panthers |
| McKendree College | Lebanon, Illinois | 1828 | 1912–1938 | Bearcats |
| Southern Illinois University Carbondale | Carbondale, Illinois | 1869 | 1913–1962 | Maroons/Salukis |
| Blackburn College | Carlinville, Illinois | 1837 | 1914–1923 | Beavers |
| St. Viator College (defunct) | Bourbonnais, Illinois | 1865 | 1916–1938 | Irish/Green |
| Western Illinois University | Macomb, Illinois | 1899 | 1914–1970 | Leathernecks |
| Knox College | Galesburg, Illinois | 1837 | 1919–1937 | Prairie Fire |
| Wheaton College | Wheaton, Illinois | 1860 | 1919–1937 | Thunder |
| Lake Forest College | Lake Forest, Illinois | 1857 | 1919–1937 | Foresters |
| Northern Illinois University | DeKalb, Illinois | 1895 | 1920–1967 | Huskies |
| Monmouth College | Monmouth, Illinois | 1853 | 1921–1937 | Fighting Scots |
| Mount Morris College (defunct) | Mount Morris, Illinois | 1839 | 1922–1931 | Mountaineers/Mounders |