| Andrew High School | Tinley Park | Northeast | 2024 |
| Bloom High School | Chicago Heights | Northeast | 2024 |
| Casey-Westfield High School | Casey | Eastern | 2024 |
| Centralia High School | Centralia | Kaskaskia | 2024 |
| Champaign Central High School | Champaign | Kickapoo | 2024 |
| Crete-Monee High School | Crete | Prairie 8 | 2024 |
| Effingham High School | Effingham | Eastern | 2024 |
| Evergreen Park High School | Evergreen Park | Northeast | 2024 |
| Fenton High School | Bensenville | Northeast | 2024 |
| Genoa-Kingston High School | Genoa | North Central | 2024 |
| Gillespie High School | Gillespie | Kaskaskia | 2024 |
| Glenbard East High School | Lombard | Northeast | 2024 |
| H.D. Jacobs High School | Algonquin | North Central | 2024 |
| Hardin County High School | Elizabethtown | Little Egypt | 2024 |
| Lakes Community High School | Lake Villa | Northeast | 2024 |
| Lowpoint-Washburn High School | Washburn | Hopewell | 2024 |
| Macomb High School | Macomb | Illinois Valley | 2024 |
| Madison High School | Madison | Kaskaskia | 2024 |
| Mt. Pulaski High School | Mt. Pulaski | Cenois | 2024 |
| Murphysboro High School | Murphysboro | Little Egypt | 2024 |
| North Boone High School | Poplar Grove | North Central | 2024 |
| Oakwood High School | Fithian | Kickapoo | 2024 |
| Putnam County High School | Granville | Hopewell | 2024 |
| Red Bud High School | Red Bud | Kaskaskia | 2024 |
| Rich East High School | Park Forest | Northeast | 2024 |
| Riverdale High School | Port Byron | Blackhawk | 2024 |
| Riverside-Brookfield High School | Riverside | Northeast | 2024 |
| Routt Catholic High School | Jacksonville | Illinois Valley | 2024 |
| South Elgin High School | South Elgin | North Central | 2024 |
| Sparta High School | Sparta | Kaskaskia | 2024 |
| St. Edward High School | Elgin | North Central | 2024 |
| St. Viator High School | Arlington Heights | Northeast | 2024 |
| Staunton High School | Staunton | Kaskaskia | 2024 |
| Stewardson-Strasburg High School | Strasburg | Eastern | 2024 |
| Unity High School | Tolono | Kickapoo | 2024 |
| Vernon Hills High School | Vernon Hills | Northeast | 2024 |
| Warrensburg-Latham High School | Warrensburg | Cenois | 2024 |
| Wheaton North High School | Wheaton | Northeast | 2024 |
| Wolcott College Prep | Chicago | Chicago | 2024 |