| Addison Trail High School | Addison | Northeast |
| Altamont High School | Altamont | Eastern |
| Alton Senior High School | Alton | Kaskaskia |
| Antioch High School | Antioch | Northeast |
| Argo Community High School | Summit | Northeast |
| 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 |
| Brownstown High School | Brownstown | Eastern |
| Byron High School | Byron | Northwest |
| Calhoun High School | Hardin | Kaskaskia |
| Cambridge High School | Cambridge | Blackhawk |
| 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 |
| Centennial High School | Champaign | Kickapoo |
| Central High School | Burlington | North Central |
| 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 |
| College Preparatory School of America | Lombard | Northeast |
| Collinsville High School | Collinsville | Kaskaskia |
| Columbia High School | Columbia | Kaskaskia |
| Coulterville High School | Coulterville | Little Egypt |
| Crab Orchard High School | Marion | Little Egypt |
| Crystal Lake Central High School | Crystal Lake | North Central |
| 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 |
| Dixon High School | Dixon | Northwest |
| 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 |
| Edwardsville High School | Edwardsville | Kaskaskia |
| Eisenhower High School | Blue Island | Northeast |
| Eldorado High School | Eldorado | Little Egypt |
| Elmwood High School | Elmwood | Hopewell |
| Eureka High School | Eureka | Hopewell |
| Fairfield Community High School | Fairfield | Eastern |
| Fieldcrest High School | Minonk | Hopewell |
| Franklin High School | Franklin | Illinois Valley |
| Freeburg High School | Freeburg | Kaskaskia |
| Gallatin County High School | Junction | Little Egypt |
| Geneseo High School | Geneseo | Blackhawk |
| Geneva High School | Geneva | North Central |
| Georgetown-Ridge Farm High School | Georgetown | Kickapoo |
| Glenbrook North High School | Northbrook | Northeast |
| Glenwood High School | Chatham | Cenois |
| Granite City High School | Granite City | Kaskaskia |
| Grayslake North High School | Grayslake | Northeast |
| Greenville High School | Greenville | Kaskaskia |
| Griggsville-Perry High School | Griggsville | Illinois Valley |
| Guilford High School | Rockford | North Central |
| Hamilton County High School | McLeansboro | 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 |
| Hillsboro High School | Hillsboro | Eastern |
| 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 |
| IC Catholic Prep | Elmhurst | Northeast |
| Illini Bluffs High School | Glasford | Hopewell |
| Illini Central High School | Mason City | Hopewell |
| Illinois Math and Science Academy | Aurora | North Central |
| Illinois Valley Central High School | Chillicothe | Hopewell |
| Iroquois West High School | Gilman | Prairie 8 |
| 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 |
| Kewanee High School | Kewanee | Blackhawk |
| Lake Park High School | Roselle | Northeast |
| Larkin High School | Elgin | North Central |
| LaSalle-Peru High School | LaSalle | Prairie 8 |
| 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 |
| Maryville Christian School | Maryville | Kaskaskia |
| Mascoutah High School | Mascoutah | Kaskaskia |
| Mattoon High School | Mattoon | Eastern |
| Meredosia-Chambersburg High School | Meredosia | Illinois Valley |
| Midland High School | Varna | Hopewell |
| Midwest Central High School | Manito | Hopewell |
| Minooka Community High School | Minooka | Prairie 8 |
| Moline High School | Moline | Blackhawk |
| Momence High School | Momence | Prairie 8 |
| Monmouth-Roseville High School | Monmouth | Blackhawk |
| Morrisonville High School | Morrisonville | Cenois |
| Morton High School | Morton | Hopewell |
| Mother McAuley High School | Chicago | Chicago |
| Mt. Vernon Township High School | Mt. Vernon | Little Egypt |
| New Berlin High School | New Berlin | Cenois |
| New Trier High School | Winnetka | Northeast |
| Newark High School | Newark | Prairie 8 |
| Newton High School | Newton | Eastern |
| Normal Community High School | Normal | Cenois |
| Normal West High School | Normal | Cenois |
| Northside College Prep High School | Chicago | Chicago |
| O'Fallon High School | O'Fallon | Kaskaskia |
| Oak Park and River Forest High School | Oak Park | Northeast |
| Odin High School | Odin | Kaskaskia |
| Okawville High School | Okawville | Kaskaskia |
| Olympia High School | Stanford | Cenois |
| Oswego High School | Oswego | North Central |
| Pekin High School | Pekin | Hopewell |
| Pittsfield High School | Pittsfield | Illinois Valley |
| Pope County High School | Golconda | Little Egypt |
| PORTA High School | Petersburg | Illinois Valley |
| Prairie Central High School | Fairbury | Prairie 8 |
| Princeton High School | Princeton | Blackhawk |
| Quincy Senior High School | Quincy | Illinois Valley |
| Rantoul High School | Rantoul | Kickapoo |
| 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 |
| Ridgewood High School | Norridge | Northeast |
| Rochelle High School | Rochelle | Northwest |
| Rock Island High School | Rock Island | Blackhawk |
| Rosary College Prep | Aurora | North Central |
| Round Lake High School | Round Lake | Northeast |
| Roxana High School | Roxana | Kaskaskia |
| Sandburg High School | Orland Park | Northeast |
| Sandoval High School | Sandoval | 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 |
| Somonauk High School | Somonauk | North Central |
| South Central High School | Farina | Eastern |
| South Fork High School | Kincaid | Eastern |
| St. Charles North High School | St. Charles | North Central |
| St. Francis High School | Wheaton | Northeast |
| St. Joseph-Ogden High School | St. Joseph | Kickapoo |
| St. Rita of Cascia High School | Chicago | Chicago |
| Stark County High School | Toulon | Hopewell |
| Sterling High School | Sterling | Northwest |
| 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 |
| Tinley Park High School | Tinley Park | Northeast |
| Tremont High School | Tremont | Hopewell |
| 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 |
| United High School | Monmouth | Blackhawk |
| United Township High School | East Moline | Blackhawk |
| Urbana High School | Urbana | Kickapoo |
| 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 |
| Wethersfield High School | Kewanee | Blackhawk |
| 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 |