This is a list of high schools in the U.S. state of Illinois.
Adams County Central High School, Camp Point Liberty High School, Liberty Payson-Seymour High School, Payson Unity High School, Mendon
Quincy Quincy Notre Dame High School Quincy Senior High School
Alexander County Cairo Junior/Senior High School, Cairo Egyptian Senior High School, Tamms
Bond County Greenville High School, Greenville Mulberry Grove High School, Mulberry Grove
Boone County North Boone High School, Poplar Grove
Belvidere Belvidere High School Belvidere North High School
Brown County Brown County High School, Mount Sterling
Bureau County Bureau Valley High School, Manlius DePue High School, DePue Hall High School, Spring Valley La Moille High School, La Moille Ohio High School, Ohio Princeton High School, Princeton
Calhoun County Brussels High School, Brussels Calhoun High School, Hardin
Carroll County Eastland High School, Lanark Milledgeville High School, Milledgeville West Carroll High School, Savanna
Cass County A-C Central High School, Ashland Beardstown High School, Beardstown Virginia Senior High School, Virginia
Champaign County Fisher Junior/Senior High School, Fisher Heritage High School, Broadlands Mahomet-Seymour High School, Mahomet Rantoul Township High School, Rantoul St. Joseph-Ogden High School, St. Joseph Unity High School, Tolono
Champaign Champaign Centennial High School Champaign Central High School Judah Christian School St. Thomas More High School
Urbana University Laboratory High School Urbana High School
Christian County Edinburg High School, Edinburg Morrisonville High School, Morrisonville Pana Senior High School, Pana South Fork Jr/Sr High School (6–12), Kincaid Taylorville High School, Taylorville
Clark County Casey-Westfield High School, Casey Marshall High School, Marshall Martinsville High School, Martinsville
Clay County Clay City High School, Clay City Flora High School, Flora North Clay High School, Louisville
Clinton County Carlyle High School, Carlyle Christ Our Rock Lutheran High School, Centralia Wesclin Senior High School, Trenton
Breese Central Community High School Mater Dei High School
Coles County Charleston High School, Charleston Mattoon High School, Mattoon Oakland High School, Oakland
Cook County
Argo Community High School, Summit Bremen High School, Midlothian Buffalo Grove High School, Buffalo Grove Christian Heritage Academy, Northfield East Leyden High School, Franklin Park Dwight D. Eisenhower High School, Blue Island Elgin High School, Elgin Elk Grove High School, Elk Grove Village Elmwood Park High School, Elmwood Park Evergreen Park Community High School, Evergreen Park Glenbrook North High School, Northbrook Glenbrook South High School, Glenview Guerin College Preparatory High School, River Grove Hillcrest High School, Country Club Hills Homewood-Flossmoor High School, Flossmoor Lemont High School, Lemont Lyons Township High School, La Grange J. Sterling Morton High School District 201, a district in Cicero and Berwyn that competes athletically as "Morton High School", comprising the following campuses: J. Sterling Morton High School East, Cicero J. Sterling Morton Freshman Center, Cicero J. Sterling Morton High School West, Berwyn Muslim Community Center Academy, Morton Grove Oak Forest High School, Oak Forest Oak Park and River Forest High School, Oak Park Prospect High School, Mount Prospect Proviso East High School, Maywood Proviso Mathematics and Science Academy, Forest Park Proviso West High School, Hillside Rich Central High School, Olympia Fields Rich East High School, Park Forest Ridgewood High School, Norridge Riverside Brookfield High School, Riverside Rochelle Zell Jewish High School, Deerfield Rolling Meadows High School, Rolling Meadows Carl Sandburg High School, Orland Park Schaumburg High School, Schaumburg Amos Alonzo Stagg High School, Palos Hills Streamwood High School, Streamwood Thornridge High School, Dolton Thornton Fractional North High School, Calumet City Thornton Township High School, Harvey Thornwood High School, South Holland Walther Christian Academy, Melrose Park West Leyden High School, Northlake Wheeling High School, Wheeling
Arlington Heights
Christian Liberty Academy John Hersey High School Vanguard School
Bridgeview Aqsa School Universal School
Burbank Queen of Peace High School Reavis High School St. Laurence High School
Chicago Public Schools
Al Raby School for Community and Environment Amundsen High School Austin Community Academy High School Bogan High School Bowen High School Bronzeville Scholastic Institute Carl Schurz High School Carver Military Academy Chicago High School for Agricultural Sciences Chicago High School for the Arts Chicago Math and Science Academy Chicago Military Academy Chicago Technology Academy Chicago Vocational High School Corliss High School Crane High School Curie Metropolitan High School Disney II Magnet School Dr. Pedro Albizu Campos High School Dunbar Vocational High School DuSable High School Dyett High School Farragut Career Academy Fenger Academy High School Foreman High School Frederick Douglass Academy High School Gage Park High School George Washington High School George Westinghouse College Prep Goode STEM Academy Gwendolyn Brooks College Preparatory Academy Harlan Community Academy High School Hirsch Metropolitan High School Hubbard High School Hyde Park Academy High School Infinity Math, Science & Technology High School John F. Kennedy High School John Hancock College Preparatory High School Jones College Prep High School Juarez Community Academy Julian High School Kelly High School Kelvyn Park High School Kenwood Academy King College Prep Lake View High School Lane Tech College Prep High School Lincoln Park High School Little Village Lawndale High School Campus Manley Career Academy High School Marshall Metropolitan High School Mather High School Michele Clark Magnet High School Morgan Park High School Noble Street College Prep North-Grand High School Northside College Preparatory High School Northside Learning Center High School Ogden International High School Orr Academy High School Phoenix Military Academy Prosser Career Academy Ray Graham Training Center Richards Career Academy Robert Lindblom Math & Science Academy Roberto Clemente Community Academy Roosevelt High School Senn High School Simeon Career Academy South Shore High School Steinmetz College Prep Sullivan High School Taft High School Tilden High School Uplift Community High School Vaughn Occupational High School Von Steuben Metropolitan High School Walter Payton College Prep Wells Community Academy High School Wendell Phillips Academy High School Whitney M. Young Magnet High School York Alternative High School
Chicago Independent Schools
Air Force Academy High School Antonia Pantoja Charter School Back of the Yards College Preparatory High School British International School of Chicago Lincoln Park British International School of Chicago, South Loop Chicago Academy for the Arts Chicago Academy High School Chicago International Charter School Northtown Academy Chicago Waldorf School Collins Academy High School Devry Advantage Academy Francis W. Parker School Hales Franciscan High School John Hope College Preparatory High School Latin School of Chicago Latino Youth High School Lubavitch Girls High School Lubavitch Mesivta of Chicago Lycée Français de Chicago Morgan Park Academy Muhammad University of Islam North Lawndale College Prep High School Providence St. Mel School St. Benedict High School Southside Occupational Academy Telshe High School University of Chicago Laboratory Schools, Chicago Urban Prep Charter Academy for Young Men West Town Academy
Archdiocese of Chicago (Chicago/Cook County)
Brother Rice High School Christ the King Jesuit College Prep High School Cristo Rey Jesuit High School De La Salle Institute DePaul College Prep Fenwick High School (Oak Park, Illinois) Holy Trinity High School Josephinum Academy Leo Catholic High School Loyola Academy, Willmette Marian Catholic High School, Chicago Heights Marist High School Mother McAuley Liberal Arts High School Mount Carmel High School Nazareth Academy (La Grange Park, Illinois) Our Lady of Tepeyac High School Regina Dominican High School, Willmette Resurrection High School St. Ignatius College Prep St. Patrick High School St. Rita of Cascia High School St. Francis de Sales High School St. Laurence High School, Burbank St. Viator High School, Arlington Heights Trinity High School (River Forest, Illinois)
Chicago Heights
Bloom High School Bloom Trail High School
Des Plaines Maine West High School North Cook Young Adult Academy The Willows Academy
Evanston Beacon Academy Evanston Township High School Roycemore School
Hoffman Estates James B. Conant High School Hoffman Estates High School
Lansing Illiana Christian High School Thornton Fractional South High School
Niles Northridge Preparatory School Notre Dame College Prep
Oak Lawn Oak Lawn Community High School Harold L. Richards High School South Side Baptist School
Palatine William Fremd High School Palatine High School St. Thomas of Villanova Catholic School
Palos Heights Alan B. Shepard High School Chicago Christian High School
Park Ridge Maine East High School Maine South High School
Richton Park Rich South High School Southland College Preparatory Charter High School
Skokie Fasman Yeshiva High School Ida Crown Jewish Academy Niles North High School Niles West High School
Tinley Park Victor J. Andrew High School Tinley Park High School
Winnetka New Trier High School North Shore Country Day School
Defunct
Academy of Our Lady (Chicago) (1875-1899) Archbishop Quigley Preparatory Seminary, Chicago (1918–2007) Arlington High School, Arlington Heights (1922–1984) Calumet High School (Chicago) (1919–2006) Chicago Discovery Academy, Chicago (closed 2013) Chicago High School, Chicago (1856–1880) Chicago Talent Development High School, Chicago (2009–2014) Cooley Vocational High School, Chicago (1958–1979) Englewood Technical Prep Academy, Chicago (1873–2008) Flower Career Academy, Chicago (1911–2003) Forest View High School, Arlington Heights (1962–1986) Holy Cross High School (River Grove, Illinois) (1961–2004) Immaculata High School (Chicago) (1921–1981) Immaculate Heart of Mary High School, Westchester (1960–2005) Las Casas Occupational High School, Chicago (closed 2011) Loretto Academy (Chicago) (1906-1972) Lourdes High School, Chicago Luther High School North, Chicago (1909-2017) Luther High School South, Chicago (closed 2014) Maine North High School, Des Plaines (1970–1981) Maria High School (Chicago, Illinois) (1911–2013) McKinley High School (Chicago) (1875–1954) Mendel Catholic High School, Chicago (1951–1988) Mount Assisi Academy, Lemont (1951-2014) Near North Career Metropolitan High School, Chicago (1977–2001) Niles East High School, Skokie (1938–1980) Northwest Suburban Academy, Arlington Heights (closed 2009) Notre Dame High School for Girls, Chicago (1938-2016) Quigley South, Chicago (1961–1990) Saint George High School (Evanston, Illinois) (1927–1969) Seton Academy (South Holland, Illinois) (1963-2016) St. Gregory the Great High School, Chicago (1937–2014) St. Joseph High School (Westchester, Illinois) (1960-2021) Saint Louise de Marillac High School, Northfield (1967–1994) St. Scholastica Academy (Chicago, Illinois) (1865–2012) Spalding High School (Chicago) (1908–2004) Weber High School (Chicago) (1890-1999) Young Women's Leadership Charter School of Chicago (1999-2019)
Crawford County
Hutsonville High School, Hutsonville Oblong High School, Oblong Palestine High School, Palestine Robinson High School, Robinson
Cumberland County Cumberland High School, Toledo Neoga Junior-Senior High School, Neoga
DeKalb County
DeKalb High School, DeKalb Genoa-Kingston High School, Genoa Hiawatha Jr/Sr High School, Kirkland Hinckley-Big Rock High School, Hinckley Indian Creek High School, Shabbona