| Apollo | Effingham | |
| Big Northern | Rockford Lutheran | |
| Big Twelve | Peoria Notre Dame | Normal Community |
| Black Diamond East | Fairfield | |
| Black Diamond West | Goreville | |
| Cahokia Kaskaskia | Steeleville | |
| Cahokia Mississippi | Central | |
| Central Illinois | Meridian | |
| Central State Eight | Lanphier | |
| Central Suburban League North | Niles North | |
| Central Suburban League South | Evanston, Glenbrook South, New Trier | |
| Chicago Catholic League Blue | Brother Rice, Fenwick | |
| Chicago Catholic League White | St. Ignatius | |
| Chicago Prep | Hope Academy | |
| CPL Central | | |
| CPL White North | Taft | |
| CPL North-West | | |
| CPL White South | Dyett | |
| CPL South-Central | | |
| CPL West | | |
| DuKane | Wheaton Warrenville South | |
| DuPage Valley | DeKalb | |
| East Central Illinois | Cornerstone Christian | |
| East Suburban Catholic | Niles Notre Dame | |
| Egyptian Illini | Patoka | |
| Fox Valley | Burlington Central | Burlington Central |
| Greater Egyptian | Norris City-Omaha-Enfield | |
| Heart of Illinois (HOIC) | LeRoy, Fieldcrest | |
| Illini Prairie | Illinois Valley Central | |
| Illinois Central Eight | Streator | |
| Inter-County Athletic Conference (ICAC) | | |
| Interstate Eight | Ottawa | |
| Kishwaukee River | Marengo | |
| Lincoln Prairie | ALAH | |
| Lincoln Trail | United, Wethersfield | |
| Little Illini | Casey-Westfield | |
| Little Okaw Valley | Martinsville | |
| Little Ten | Indian Creek | |
| Metro Suburban | Timothy Christian | |
| Mid Illini | Washington | Washington |
| Mid Suburban East | Rolling Meadows | Rolling Meadows |
| Mid Suburban West | Barrington | |
| Midland Trail | Wayne City | |
| Mississippi Valley | Mascoutah | |
| MSM | South County | |
| National Trail | St. Anthony | |
| NIC-10 | Rockford East | |
| Noble | | Bulls |
| North Lake County | Round Lake | |
| North Suburban | Mundelein | |
| Northeastern Athletic | Schaumburg Christian | |
| NUIC North | Aquin | |
| NUIC South | Eastland, Milledgeville | |
| NUIC West | East Dubuque | |
| Pike County | Griggsville-Perry | |
| Prairie State | Metro-East Lutheran | |
| Prairieland North | Knoxville | |
| Prairieland South | Illini West | |
| River-to-River Mississippi | Nashville | |
| River-to-River Ohio | Massac County | |
| River Valley | Gardner-South Wilmington | |
| Sangamo | PORTA | |
| Sangamon Valley | Paxton-Buckley-Loda | |
| South Central | Hillsboro | |
| South Egyptian | Cobden | |
| South Seven | Centralia | |
| South Suburban Blue | Hillcrest | |
| South Suburban Red | Richards | |
| Southland | Kankakee | |
| Southwest Prairie East | Joliet West | Plainfield South |
| Southwest Prairie West | Oswego East | Plainfield South |
| Southwest Suburban Blue | Bolingbrook, Homewood-Flossmoor | |
| Southwest Suburban Red | Andrew | |
| Southwestern | Belleville East | East St. Louis |
| Three Rivers East | Princeton | |
| Three Rivers West | Rockridge | |
| Tomahawk | Mt. Pulaski | |
| Tri-County | Roanoke-Benson | |
| Upstate Eight | Bartlett | Bartlett |
| Vermillion Valley | Oakwood | |
| West Central North | | |
| West Central South | | |
| West Suburban Gold | Hinsdale South | |
| West Suburban Silver | Downers Grove North, Glenbard West | |
| Western Big Six | Rock Island | |
| Western Illinois Valley | West Central | |
