| A-C Central High School | Ashland | Illinois Valley | 2018 |
| Agape Christian High School | Marion | Little Egypt | 2018 |
| Astoria High School | Astoria | Illinois Valley | 2018 |
| Auburn High School | Auburn | Cenois | 2018 |
| Bismarck-Henning High School | Bismarck | Kickapoo | 2018 |
| Bloomington High School | Bloomington | Cenois | 2018 |
| Bunker Hill High School | Bunker Hill | Kaskaskia | 2018 |
| Christopher High School | Christopher | Little Egypt | 2018 |
| Clinton High School | Clinton | Cenois | 2018 |
| Crete-Monee High School | Crete | Prairie 8 | 2018 |
| DePue High School | DePue | Blackhawk | 2018 |
| Effingham High School | Effingham | Eastern | 2018 |
| Freeport High School | Freeport | Northwest | 2018 |
| Galena High School | Galena | Northwest | 2018 |
| Genoa-Kingston High School | Genoa | North Central | 2018 |
| H.D. Jacobs High School | Algonquin | North Central | 2018 |
| Henry-Senachwine High School | Henry | Hopewell | 2018 |
| Heritage High School | Broadlands | Kickapoo | 2018 |
| Hersey High School | Arlington Heights | Northeast | 2018 |
| Homewood-Flossmoor High School | Flossmoor | Northeast | 2018 |
| Jefferson High School | Rockford | North Central | 2018 |
| Lena-Winslow High School | Lena | Northwest | 2018 |
| MacArthur High School | Decatur | Cenois | 2018 |
| Marist High School | Chicago | Chicago | 2018 |
| Morgan Park High School | Chicago | Chicago | 2018 |
| Mundelein High School | Mundelein | Northeast | 2018 |
| Nokomis High School | Nokomis | Eastern | 2018 |
| Oblong High School | Oblong | Eastern | 2018 |
| Ottawa Township High School | Ottawa | Prairie 8 | 2018 |
| Plainfield Central High School | Plainfield | Prairie 8 | 2018 |
| Pontiac Township High School | Pontiac | Prairie 8 | 2018 |
| Proviso East High School | Maywood | Northeast | 2018 |
| Rantoul High School | Rantoul | Kickapoo | 2018 |
| Riverton High School | Riverton | Cenois | 2018 |
| Rock Island High School | Rock Island | Blackhawk | 2018 |
| Scales Mound High School | Scales Mound | Northwest | 2018 |
| Stark County High School | Toulon | Hopewell | 2018 |
| Tri-City High School | Buffalo | Cenois | 2018 |