| Abingdon-Avon High School | Abingdon | Hopewell |
| Addison Trail High School | Addison | Northeast |
| Altamont High School | Altamont | Eastern |
| Alton Senior High School | Alton | Kaskaskia |
| Amboy High School | Amboy | Northwest |
| Argo Community High School | Summit | Northeast |
| Armstrong High School | Armstrong | Kickapoo |
| Arthur-Lovington-Atwood-Hammond High School | Arthur | Kickapoo |
| Auburn High School | Rockford | North Central |
| Belleville East High School | Belleville | Kaskaskia |
| Belleville West High School | Belleville | Kaskaskia |
| Belvidere North High School | Belvidere | North Central |
| Benton High School | Benton | Little Egypt |
| Blue Ridge High School | Farmer City | Cenois |
| Bradley-Bourbonnais High School | Bradley | Prairie 8 |
| Brown County High School | Mt. Sterling | Illinois Valley |
| Bunker Hill High School | Bunker Hill | Kaskaskia |
| Byron High School | Byron | Northwest |
| Calhoun High School | Hardin | Kaskaskia |
| 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 |
| Carrier Mills-Stonefort High School | Carrier Mills | Little Egypt |
| Carterville High School | Carterville | Little Egypt |
| Casey-Westfield High School | Casey | Eastern |
| Cerro Gordo High School | Cerro Gordo | Cenois |
| Chester High School | Chester | Little Egypt |
| Cisne High School | Cisne | Eastern |
| Civic Memorial High School | Bethalto | Kaskaskia |
| Clay City High School | Clay City | Eastern |
| Clifton Central High School | Clifton | Prairie 8 |
| Cobden High School | Cobden | Little Egypt |
| 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 |
| Dakota High School | Dakota | Northwest |
| Deer Creek-Mackinaw High School | Mackinaw | Hopewell |
| DeKalb High School | DeKalb | North Central |
| Delavan High School | Delavan | Hopewell |
| Donovan High School | Donovan | Prairie 8 |
| 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 |
| Eastland Jr./Sr. High School | Lanark | Northwest |
| Edinburg High School | Edinburg | Eastern |
| Effingham High School | Effingham | Eastern |
| Eisenhower High School | Blue Island | Northeast |
| Eldorado High School | Eldorado | Little Egypt |
| Elmwood High School | Elmwood | Hopewell |
| Elmwood Park High School | Elmwood Park | Northeast |
| Eureka High School | Eureka | Hopewell |
| Evergreen Park High School | Evergreen Park | Northeast |
| Fairfield Community High School | Fairfield | Eastern |
| Fieldcrest High School | Minonk | Hopewell |
| Freeburg High School | Freeburg | Kaskaskia |
| Geneseo High School | Geneseo | Blackhawk |
| Genoa-Kingston High School | Genoa | North Central |
| Georgetown-Ridge Farm High School | Georgetown | Kickapoo |
| Gibault Catholic High School | Waterloo | Kaskaskia |
| Gillespie High School | Gillespie | Kaskaskia |
| Glenwood High School | Chatham | Cenois |
| Granite City High School | Granite City | Kaskaskia |
| Greenville High School | Greenville | Kaskaskia |
| Guilford High School | Rockford | North Central |
| H.D. Jacobs High School | Algonquin | North Central |
| Hamilton County High School | McLeansboro | Little Egypt |
| Hardin County High School | Elizabethtown | Little Egypt |
| Harrisburg High School | Harrisburg | Little Egypt |
| Heritage High School | Broadlands | Kickapoo |
| Herrin High School | Herrin | Little Egypt |
| Herscher High School | Herscher | Prairie 8 |
| Highland High School | Highland | Kaskaskia |
| Hillcrest High School | Country Club Hills | Northeast |
| Homewood-Flossmoor High School | Flossmoor | Northeast |
| Hononegah High School | Rockton | North Central |
| Hoopeston Area High School | Hoopeston | Kickapoo |
| 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 Valley Central High School | Chillicothe | Hopewell |
| Indian Creek High School | Shabbona | North Central |
| Jefferson High School | Rockford | North Central |
| John Hancock College Prep | Chicago | Chicago |
| Johnsburg High School | Johnsburg | North Central |
| Johnston City High School | Johnston City | Little Egypt |
| Joliet Catholic Academy | Joliet | Prairie 8 |
| Jones College Prep | Chicago | Chicago |
| Kankakee High School | Kankakee | Prairie 8 |
| Kewanee High School | Kewanee | Blackhawk |
| Lake Park High School | Roselle | Northeast |
| Larkin High School | Elgin | North Central |
| Lena-Winslow High School | Lena | Northwest |
| Liberty High School | Liberty | Illinois Valley |
| Lincolnwood High School | Raymond | Cenois |
| Lyons Township High School | LaGrange | Northeast |
| Mahomet-Seymour High School | Mahomet | Kickapoo |
| Marion High School | Marion | Little Egypt |
| Marmion Academy | Aurora | North Central |
| Mascoutah High School | Mascoutah | Kaskaskia |
| Mattoon High School | Mattoon | Eastern |
| Mendota High School | Mendota | Prairie 8 |
| Meredosia-Chambersburg High School | Meredosia | Illinois Valley |
| Midland High School | Varna | Hopewell |
| Midwest Central High School | Manito | Hopewell |
| Monmouth-Roseville High School | Monmouth | Blackhawk |
| Morris Community High School | Morris | Prairie 8 |
| Morton High School | Morton | Hopewell |
| Mt. Pulaski High School | Mt. Pulaski | Cenois |
| Mt. Vernon Township High School | Mt. Vernon | Little Egypt |
| Murphysboro High School | Murphysboro | 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 |
| Paris High School | Paris | Eastern |
| Pekin High School | Pekin | Hopewell |
| Pope County High School | Golconda | Little Egypt |
| PORTA High School | Petersburg | Illinois Valley |
| Prairie Central High School | Fairbury | Prairie 8 |
| Prairie Ridge High School | Crystal Lake | North Central |
| Princeton High School | Princeton | Blackhawk |
| Putnam County High School | Granville | Hopewell |
| Quincy Senior High School | Quincy | Illinois Valley |
| Rantoul High School | Rantoul | Kickapoo |
| Reavis High School | Burbank | Northeast |
| Red Bud High School | Red Bud | Kaskaskia |
| Red Hill High School | Bridgeport | Eastern |
| Richards High School | Oak Lawn | Northeast |
| Richmond-Burton High School | Richmond | North Central |
| Ridgewood High School | Norridge | Northeast |
| Riverdale High School | Port Byron | Blackhawk |
| Routt Catholic High School | Jacksonville | Illinois Valley |
| Roxana High School | Roxana | Kaskaskia |
| Sangamon Valley High School | Niantic | Cenois |
| Schaumburg High School | Schaumburg | Northeast |
| Shelbyville High School | Shelbyville | Eastern |
| Shiloh High School | Hume | Kickapoo |
| SIUE Charter School | Edwardsville | Kaskaskia |
| South Central High School | Farina | Eastern |
| South Elgin High School | South Elgin | North Central |
| South Fork High School | Kincaid | Eastern |
| Sparta High School | Sparta | Kaskaskia |
| St. Charles North High School | St. Charles | North Central |
| St. Edward High School | Elgin | North Central |
| St. Joseph-Ogden High School | St. Joseph | Kickapoo |
| St. Rita of Cascia High School | Chicago | Chicago |
| St. Viator High School | Arlington Heights | Northeast |
| Stark County High School | Toulon | Hopewell |
| Stevenson High School | Lincolnshire | Northeast |
| Stewardson-Strasburg High School | Strasburg | Eastern |
| Stillman Valley High School | Stillman Valley | Northwest |
| Sullivan High School | Sullivan | Eastern |
| Taylorville High School | Taylorville | Cenois |
| Teutopolis High School | Teutopolis | Eastern |
| Thornton Fractional North High School | Calumet City | Northeast |
| Tri-Point High School | Cullom | Prairie 8 |
| Triad High School | Troy | Kaskaskia |
| Trico High School | Campbell Hill | Little Egypt |
| Trinity Oaks Christian Academy | Cary | Northeast |
| Tuscola High School | Tuscola | Kickapoo |
| Unity High School | Tolono | Kickapoo |
| Vernon Hills High School | Vernon Hills | Northeast |
| Villa Grove High School | Villa Grove | Kickapoo |
| Warrensburg-Latham High School | Warrensburg | Cenois |
| Waterloo High School | Waterloo | Kaskaskia |
| Wesclin High School | Trenton | Kaskaskia |
| West Carroll High School | Savanna | Northwest |
| Wethersfield High School | Kewanee | Blackhawk |
| Wheaton North High School | Wheaton | Northeast |
| Wilmington High School | Wilmington | Prairie 8 |
| Windsor High School | Windsor | Eastern |
| Winnebago High School | Winnebago | Northwest |
| Wolcott College Prep | Chicago | Chicago |
| Woodstock North High School | Woodstock | North Central |
| York High School | Elmhurst | Northeast |
| Zeigler-Royalton High School | Zeigler | Little Egypt |