School, Mount Zion Sangamon Valley High School, Niantic Warrensburg-Latham High School, Warrensburg Decatur Eisenhower High School Lutheran School Association Decatur MacArthur High School St. Teresa High School Defunct Stephen Decatur High School, Decatur (1911–2000) Macoupin County Bunker Hill High School, Bunker Hill Carlinville High School, Carlinville Gillespie High School, Gillespie Mount Olive High School, Mount Olive North Mac High School, Virden Northwestern High School, Palmyra Southwestern High School, Piasa Staunton High School, Staunton Madison County Civic Memorial High School, Bethalto Collinsville High School, Collinsville East Alton-Wood River High School, Wood River Father McGivney Catholic High School, Maryville Granite City High School, Granite City Highland High School, Highland Madison Senior High School, Madison Roxana High School, Roxana Triad High School, Troy Alton Alton Senior High School Marquette Catholic High School Edwardsville Edwardsville High School Metro-East Lutheran High School Defunct Livingston High School, Livingston (Late 1800s–2004) Venice High School, Venice (1917–2004) Marion County Centralia High School, Centralia Odin High School, Odin Patoka Senior High School, Patoka Salem Community High School, Salem Sandoval Junior-Senior High School, Sandoval South Central High School, Farina Marshall County Henry-Senachwine High School, Henry Midland High School, Varna Mason County Havana High School, Havana Illini Central High School, Mason City Midwest Central High School, Manito Massac County Joppa-Maple Grove High School, Joppa Massac County High School, Metropolis McDonough County Bushnell-Prairie City High School, Bushnell Macomb High School, Macomb West Prairie High School, Sciota McHenry County Alden-Hebron High School, Hebron Cary-Grove High School, Cary Harvard High School, Harvard Huntley High School, Huntley Jacobs High School, Algonquin Johnsburg High School, Johnsburg Marengo Community High School, Marengo McHenry High School, McHenry Richmond-Burton Community High School, Richmond Crystal Lake Crystal Lake Central High School Crystal Lake South High School Prairie Ridge High School Woodstock Marian Central Catholic High School Woodstock High School Woodstock North High School McLean County El Paso-Gridley High School, Gridley Heyworth High School, Heyworth LeRoy High School, Le Roy Lexington High School, Lexington Olympia High School, Stanford Ridgeview High School, Colfax Tri-Valley High School, Downs Bloomington Bloomington High School Central Catholic High School Cornerstone Christian Academy Regional Alternative School Normal Calvary Christian Academy Normal Community High School Normal Community West High School University High School Menard County Athens Senior High School, Athens Greenview High School, Greenview Porta High School, Petersburg Mercer County Mercer County High School, Aledo Monroe County Columbia High School, Columbia Valmeyer High School, Valmeyer Waterloo Gibault Catholic