| A-C Central High School | Ashland | Illinois Valley | 2023 |
| Antioch High School | Antioch | Northeast | 2023 |
| Beecher High School | Beecher | Northeast | 2023 |
| Belvidere High School | Belvidere | North Central | 2023 |
| Bradley-Bourbonnais High School | Bradley | Prairie 8 | 2023 |
| Brownstown High School | Brownstown | Eastern | 2023 |
| Casey-Westfield High School | Casey | Eastern | 2023 |
| Central A & M High School | Moweaqua | Eastern | 2023 |
| Chadwick-Milledgeville High School | Milledgeville | Northwest | 2023 |
| Champaign Central High School | Champaign | Kickapoo | 2023 |
| Charleston High School | Charleston | Eastern | 2023 |
| Cisne High School | Cisne | Eastern | 2023 |
| Cobden High School | Cobden | Little Egypt | 2023 |
| Columbia High School | Columbia | Kaskaskia | 2023 |
| Crete-Monee High School | Crete | Prairie 8 | 2023 |
| Dakota High School | Dakota | Northwest | 2023 |
| Danville High School | Danville | Kickapoo | 2023 |
| DeLand-Weldon High School | DeLand | Kickapoo | 2023 |
| Dupo High School | Dupo | Kaskaskia | 2023 |
| Edwardsville High School | Edwardsville | Kaskaskia | 2023 |
| Eldorado High School | Eldorado | Little Egypt | 2023 |
| Elverado High School | Elkville | Little Egypt | 2023 |
| EPIC Academy | Chicago | Chicago | 2023 |
| Evanston Township High School | Evanston | Northeast | 2023 |
| Evergreen Park High School | Evergreen Park | Northeast | 2023 |
| Fenton High School | Bensenville | Northeast | 2023 |
| Fremd High School | Palatine | Northeast | 2023 |
| Fulton High School | Fulton | Northwest | 2023 |
| Gallatin County High School | Junction | Little Egypt | 2023 |
| Glenbard East High School | Lombard | Northeast | 2023 |
| Glenbard South High School | Glen Ellyn | Northeast | 2023 |
| Glenbrook North High School | Northbrook | Northeast | 2023 |
| Hartsburg-Emden High School | Hartsburg | Cenois | 2023 |
| Heyworth High School | Heyworth | Cenois | 2023 |
| Hillsboro High School | Hillsboro | Eastern | 2023 |
| Hoffman Estates High School | Hoffman Estates | Northeast | 2023 |
| Illinois Math and Science Academy | Aurora | North Central | 2023 |
| Illinois School for the Visually Impaired | Jacksonville | Illinois Valley | 2023 |
| Joppa-Maple Grove High School | Joppa | Little Egypt | 2023 |
| Lakes Community High School | Lake Villa | Northeast | 2023 |
| Leyden High School | Franklin Park | Northeast | 2023 |
| Lowpoint-Washburn High School | Washburn | Hopewell | 2023 |
| MacArthur High School | Decatur | Cenois | 2023 |
| Macomb High School | Macomb | Illinois Valley | 2023 |
| Madison High School | Madison | Kaskaskia | 2023 |
| Mahomet-Seymour High School | Mahomet | Kickapoo | 2023 |
| Marquette Catholic High School | Alton | Kaskaskia | 2023 |
| Maryville Christian School | Maryville | Kaskaskia | 2023 |
| Mendota High School | Mendota | Prairie 8 | 2023 |
| Minooka Community High School | Minooka | Prairie 8 | 2023 |
| Momence High School | Momence | Prairie 8 | 2023 |
| Morrison High School | Morrison | Northwest | 2023 |
| Morrisonville High School | Morrisonville | Cenois | 2023 |
| New Berlin High School | New Berlin | Cenois | 2023 |
| Normal Community High School | Normal | Cenois | 2023 |
| Northside College Prep High School | Chicago | Chicago | 2023 |
| O'Fallon High School | O'Fallon | Kaskaskia | 2023 |
| Oak Park and River Forest High School | Oak Park | Northeast | 2023 |
| Oakland High School | Oakland | Eastern | 2023 |
| Oakwood High School | Fithian | Kickapoo | 2023 |
| Orion High School | Orion | Blackhawk | 2023 |
| Oswego High School | Oswego | North Central | 2023 |
| Ottawa Township High School | Ottawa | Prairie 8 | 2023 |
| Paxton-Buckley-Loda High School | Paxton | Kickapoo | 2023 |
| Pittsfield High School | Pittsfield | Illinois Valley | 2023 |
| Prairie Ridge High School | Crystal Lake | North Central | 2023 |
| Princeton High School | Princeton | Blackhawk | 2023 |
| Prophetstown High School | Prophetstown | Northwest | 2023 |
| Rantoul High School | Rantoul | Kickapoo | 2023 |
| Riverdale High School | Port Byron | Blackhawk | 2023 |
| Rochelle High School | Rochelle | Northwest | 2023 |
| Rosary High School | Aurora | North Central | 2023 |
| Round Lake High School | Round Lake | Northeast | 2023 |
| Sandburg High School | Orland Park | Northeast | 2023 |
| Serena High School | Serena | North Central | 2023 |
| SIUE Charter School | Edwardsville | Kaskaskia | 2023 |
| South Elgin High School | South Elgin | North Central | 2023 |
| South Fork High School | Kincaid | Eastern | 2023 |
| Sparta High School | Sparta | Kaskaskia | 2023 |
| Sterling High School | Sterling | Northwest | 2023 |
| Tremont High School | Tremont | Hopewell | 2023 |
| United High School | Monmouth | Blackhawk | 2023 |
| Unity High School | Tolono | Kickapoo | 2023 |
| Vernon Hills High School | Vernon Hills | Northeast | 2023 |
| Vienna High School | Vienna | Little Egypt | 2023 |
| Villa Grove High School | Villa Grove | Kickapoo | 2023 |
| Wilmington High School | Wilmington | Prairie 8 | 2023 |
| Wolcott College Prep | Chicago | Chicago | 2023 |
| Woodland High School | Streator | Prairie 8 | 2023 |