| Abingdon-Avon High School | Abingdon | Hopewell |
| Addison Trail High School | Addison | Northeast |
| Altamont High School | Altamont | Eastern |
| Alton Senior High School | Alton | Kaskaskia |
| AlWood High School | Woodhull | Blackhawk |
| Amboy High School | Amboy | Northwest |
| Anna-Jonesboro High School | Anna | Little Egypt |
| Antioch High School | Antioch | Northeast |
| Armstrong High School | Armstrong | Kickapoo |
| Auburn High School | Rockford | North Central |
| Beecher High School | Beecher | Northeast |
| Belleville East High School | Belleville | Kaskaskia |
| Belleville West High School | Belleville | Kaskaskia |
| Belvidere High School | Belvidere | North Central |
| Belvidere North High School | Belvidere | North Central |
| Benton High School | Benton | Little Egypt |
| Blue Ridge High School | Farmer City | Cenois |
| Bond County Community Unit 2 High School | Greenville | Kaskaskia |
| Bradley-Bourbonnais High School | Bradley | Prairie 8 |
| Brown County High School | Mt. Sterling | Illinois Valley |
| Byron High School | Byron | Northwest |
| Cambridge High School | Cambridge | Blackhawk |
| Capital Area Career Center | Springfield | Cenois |
| Carbondale High School | Carbondale | Little Egypt |
| Carlyle High School | Carlyle | Kaskaskia |
| Carmi-White County High School | Carmi | Little Egypt |
| Centennial High School | Champaign | Kickapoo |
| Charleston High School | Charleston | Eastern |
| Chester High School | Chester | Little Egypt |
| Christ the King Jesuit College Preparatory School | Chicago | Chicago |
| Clifton Central High School | Clifton | Prairie 8 |
| Collinsville High School | Collinsville | Kaskaskia |
| Columbia High School | Columbia | Kaskaskia |
| Coulterville High School | Coulterville | Little Egypt |
| Crab Orchard High School | Marion | Little Egypt |
| Cumberland High School | Toledo | Eastern |
| Deer Creek-Mackinaw High School | Mackinaw | Hopewell |
| DeKalb High School | DeKalb | North Central |
| Donovan High School | Donovan | Prairie 8 |
| Dunlap High School | Dunlap | Hopewell |
| Dupo High School | Dupo | Kaskaskia |
| DuQuoin High School | DuQuoin | Little Egypt |
| Dwight High School | Dwight | Prairie 8 |
| East Alton-Wood River High School | Wood River | Kaskaskia |
| East St. Louis Senior High School | East St. Louis | Kaskaskia |
| Eastland Jr./Sr. High School | Lanark | Northwest |
| Edinburg High School | Edinburg | Eastern |
| Edwardsville High School | Edwardsville | Kaskaskia |
| Effingham High School | Effingham | Eastern |
| Eldorado High School | Eldorado | Little Egypt |
| Elmwood High School | Elmwood | Hopewell |
| Fairfield Community High School | Fairfield | Eastern |
| Fenton High School | Bensenville | Northeast |
| Fieldcrest High School | Minonk | Hopewell |
| Freeburg High School | Freeburg | Kaskaskia |
| Freeport High School | Freeport | Northwest |
| Gallatin County High School | Junction | Little Egypt |
| Geneseo High School | Geneseo | Blackhawk |
| Genoa-Kingston High School | Genoa | North Central |
| Gillespie High School | Gillespie | Kaskaskia |
| Glenwood High School | Chatham | Cenois |
| Granite City High School | Granite City | Kaskaskia |
| Guilford High School | Rockford | North Central |
| Heritage High School | Broadlands | Kickapoo |
| Herrin High School | Herrin | Little Egypt |
| Herscher High School | Herscher | Prairie 8 |
| Highland High School | Highland | Kaskaskia |
| Hillsboro High School | Hillsboro | Eastern |
| Hinckley-Big Rock High School | Hinckley | North Central |
| Hononegah High School | Rockton | North Central |
| Huntley High School | Huntley | North Central |
| Hutsonville High School | Hutsonville | Eastern |
| Illini Bluffs High School | Glasford | Hopewell |
| Illini Central High School | Mason City | Hopewell |
| Illinois Lutheran High School | Crete | Prairie 8 |
| Illinois Math and Science Academy | Aurora | North Central |
| Illinois Valley Central High School | Chillicothe | Hopewell |
| Iroquois West High School | Gilman | Prairie 8 |
| John Hancock College Prep | Chicago | Chicago |
| Johnston City High School | Johnston City | Little Egypt |
| Joliet Catholic Academy | Joliet | Prairie 8 |
| Lake Park High School | Roselle | Northeast |
| Lakes Community High School | Lake Villa | Northeast |
| LaMoille High School | LaMoille | Blackhawk |
| Larkin High School | Elgin | North Central |
| Lebanon High School | Lebanon | Kaskaskia |
| Lena-Winslow High School | Lena | Northwest |
| Lincolnwood High School | Raymond | Cenois |
| Lyons Township High School | LaGrange | Northeast |
| Mahomet-Seymour High School | Mahomet | Kickapoo |
| Marion High School | Marion | Little Egypt |
| Marquette Academy | Ottawa | Prairie 8 |
| Mattoon High School | Mattoon | Eastern |
| Meredosia-Chambersburg High School | Meredosia | Illinois Valley |
| Midland High School | Varna | Hopewell |
| Monmouth-Roseville High School | Monmouth | Blackhawk |
| Morris Community High School | Morris | Prairie 8 |
| Morton High School | Morton | Hopewell |
| Mt. Vernon Township High School | Mt. Vernon | Little Egypt |
| New Trier High School | Winnetka | Northeast |
| Newark High School | Newark | Prairie 8 |
| Newton High School | Newton | Eastern |
| Normal West High School | Normal | Cenois |
| Northwestern High School | Palmyra | Kaskaskia |
| O'Fallon High School | O'Fallon | Kaskaskia |
| Odin High School | Odin | Kaskaskia |
| Okawville High School | Okawville | Kaskaskia |
| Olympia High School | Stanford | Cenois |
| Oregon Jr./Sr. High School | Oregon | Northwest |
| Our Lady of Tepeyac High School | Chicago | Chicago |
| Paris High School | Paris | Eastern |
| Pekin High School | Pekin | Hopewell |
| Plainfield North High School | Plainfield | Prairie 8 |
| Pope County High School | Golconda | Little Egypt |
| PORTA High School | Petersburg | Cenois |
| Prairie Ridge High School | Crystal Lake | North Central |
| Princeton High School | Princeton | Blackhawk |
| Putnam County High School | Granville | Hopewell |
| Rantoul High School | Rantoul | Kickapoo |
| Reavis High School | Burbank | Northeast |
| Red Bud High School | Red Bud | Kaskaskia |
| Red Hill High School | Bridgeport | Eastern |
| Reed-Custer High School | Braidwood | Prairie 8 |
| Richards High School | Oak Lawn | Northeast |
| Richmond-Burton High School | Richmond | North Central |
| Riverside-Brookfield High School | Riverside | Northeast |
| Rochelle High School | Rochelle | Northwest |
| Rosary College Prep | Aurora | North Central |
| Routt Catholic High School | Jacksonville | Illinois Valley |
| Roxana High School | Roxana | Kaskaskia |
| Sandburg High School | Orland Park | Northeast |
| Sandoval High School | Sandoval | Kaskaskia |
| Sandwich High School | Sandwich | North Central |
| Sangamon Valley High School | Niantic | Cenois |
| Shelbyville High School | Shelbyville | Eastern |
| Shiloh High School | Hume | Kickapoo |
| SIUE Charter School | Edwardsville | Kaskaskia |
| Somonauk High School | Somonauk | North Central |
| St. Charles North High School | St. Charles | North Central |
| St. Edward Central Catholic High School | Elgin | North Central |
| St. Francis de Sales High School | Chicago | Chicago |
| St. Francis High School | Wheaton | Northeast |
| St. Joseph-Ogden High School | St. Joseph | Kickapoo |
| Stillman Valley High School | Stillman Valley | Northwest |
| Sullivan High School | Sullivan | Eastern |
| Taylorville High School | Taylorville | Cenois |
| Teutopolis High School | Teutopolis | Eastern |
| Tremont High School | Tremont | Hopewell |
| Triad High School | Troy | Kaskaskia |
| Trico High School | Campbell Hill | Little Egypt |
| Tuscola High School | Tuscola | Kickapoo |
| United Township High School | East Moline | Blackhawk |
| Urban Prep Academy - West Campus | Chicago | Chicago |
| Victor J. Andrew High School | Tinley Park | Northeast |
| Vienna High School | Vienna | Little Egypt |
| Villa Grove High School | Villa Grove | Kickapoo |
| Waterloo High School | Waterloo | Kaskaskia |
| Wauconda High School | Wauconda | Northeast |
| Wesclin High School | Trenton | Kaskaskia |
| West Carroll High School | Savanna | Northwest |
| Western High School | Barry | Illinois Valley |
| Wheaton North High School | Wheaton | Northeast |
| Willowbrook High School | Villa Park | Northeast |
| Windsor High School | Windsor | Eastern |
| Winnebago High School | Winnebago | Northwest |
| Woodstock North High School | Woodstock | North Central |
| York High School | Elmhurst | Northeast |
| Zeigler-Royalton High School | Zeigler | Little Egypt |