| Addison Trail High School | Addison | Northeast |
| Arthur-Lovington-Atwood-Hammond High School | Arthur | Kickapoo |
| Belleville West High School | Belleville | Kaskaskia |
| Blue Ridge High School | Farmer City | Cenois |
| Brownstown High School | Brownstown | Eastern |
| Byron High School | Byron | Northwest |
| Carlyle High School | Carlyle | Kaskaskia |
| Carmi-White County High School | Carmi | Little Egypt |
| College Preparatory School of America | Lombard | Northeast |
| DeKalb High School | DeKalb | North Central |
| Dixon High School | Dixon | Northwest |
| Dupo High School | Dupo | Kaskaskia |
| Edinburg High School | Edinburg | Eastern |
| Elmwood High School | Elmwood | Hopewell |
| Fairfield Community High School | Fairfield | Eastern |
| Fieldcrest High School | Minonk | Hopewell |
| Freeburg High School | Freeburg | Kaskaskia |
| Geneseo High School | Geneseo | Blackhawk |
| Geneva High School | Geneva | North Central |
| Glenwood High School | Chatham | Cenois |
| Grayslake North High School | Grayslake | Northeast |
| Griggsville-Perry High School | Griggsville | Illinois Valley |
| Herrin High School | Herrin | Little Egypt |
| Highland High School | Highland | Kaskaskia |
| Hillsboro High School | Hillsboro | Eastern |
| Homewood-Flossmoor High School | Flossmoor | Northeast |
| Hononegah High School | Rockton | North Central |
| Illinois Valley Central High School | Chillicothe | Hopewell |
| Iroquois West High School | Gilman | Prairie 8 |
| Johnston City High School | Johnston City | Little Egypt |
| Larkin High School | Elgin | North Central |
| Liberty High School | Liberty | Illinois Valley |
| Lyons Township High School | LaGrange | Northeast |
| Marion High School | Marion | Little Egypt |
| Marmion Academy | Aurora | North Central |
| Meredosia-Chambersburg High School | Meredosia | Illinois Valley |
| Midland High School | Varna | Hopewell |
| Morton High School | Morton | Hopewell |
| Mother McAuley High School | Chicago | Chicago |
| New Trier High School | Winnetka | Northeast |
| Newton High School | Newton | Eastern |
| Normal Community High School | Normal | Cenois |
| Normal West High School | Normal | Cenois |
| Oak Park and River Forest High School | Oak Park | Northeast |
| Quincy Senior High School | Quincy | Illinois Valley |
| Red Hill High School | Bridgeport | Eastern |
| Richards High School | Oak Lawn | Northeast |
| Rochelle High School | Rochelle | Northwest |
| Rosary College Prep | Aurora | North Central |
| Roxana High School | Roxana | Kaskaskia |
| Sandburg High School | Orland Park | Northeast |
| St. Charles North High School | St. Charles | North Central |
| Stark County High School | Toulon | Hopewell |
| Stillman Valley High School | Stillman Valley | Northwest |
| Taylorville High School | Taylorville | Cenois |
| Trico High School | Campbell Hill | Little Egypt |
| Tuscola High School | Tuscola | Kickapoo |
| Villa Grove High School | Villa Grove | Kickapoo |
| Waterloo High School | Waterloo | Kaskaskia |
| West Carroll High School | Savanna | Northwest |
| Wethersfield High School | Kewanee | Blackhawk |
| Windsor High School | Windsor | Eastern |
| Winnebago High School | Winnebago | Northwest |
| Woodstock North High School | Woodstock | North Central |
| Zeigler-Royalton High School | Zeigler | Little Egypt |