List of high schools in Illinois

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

 * 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
 * Sandwich Community High School, Sandwich, also serves students in Kendall and LaSalle counties
 * Somonauk High School, Somonauk, also serves students in LaSalle County
 * Sycamore High School, Sycamore

DeWitt County

 * Blue Ridge High School, Farmer City
 * Clinton High School, Clinton

Douglas County

 * Arcola High School, Arcola
 * Arthur-Lovington-Atwood-Hammond High School, Arthur
 * Tuscola Community High School, Tuscola
 * Villa Grove High School, Villa Grove

DuPage County

 * Addison Trail High School, Addison
 * Bartlett High School, Bartlett
 * Fenton High School, Bensenville
 * Glenbard North High School, Carol Stream
 * Hinsdale Central High School, Hinsdale
 * Hinsdale South High School, Darien
 * Lake Park High School, Roselle
 * Westmont High School, Westmont

Aurora

 * Metea Valley High School
 * Waubonsie Valley High School

Downers Grove

 * Downers Grove North High School
 * Downers Grove South High School

Elmhurst

 * IC Catholic Prep
 * Timothy Christian School
 * York Community High School

Glen Ellyn

 * Glenbard South High School
 * Glenbard West High School

Lisle

 * Benet Academy
 * Lisle High School

Lombard

 * College Preparatory School of America
 * Glenbard East High School
 * Montini Catholic High School

Naperville

 * Naperville Central High School
 * Naperville North High School

Villa Park

 * Islamic Foundation School
 * Willowbrook High School

Wheaton

 * St. Francis High School
 * Wheaton North High School
 * Wheaton Warrenville South High School

West Chicago

 * West Chicago Community High School
 * Wheaton Academy

Defunct

 * Driscoll Catholic High School, Addison (1966–2009)
 * Indian Plains Alternative High School, Aurora (closed 2018)
 * Midwest Military Academy, Wheaton (1931-1988)

Edgar County

 * Chrisman High School, Chrisman
 * Kansas High School, Kansas
 * Paris Cooperative High School, Paris
 * Shiloh High School, Hume

Edwards County

 * Edwards County High School, Albion

Effingham County

 * Altamont High School, Altamont
 * Beecher City Jr/Sr High School, Beecher City
 * Dieterich Jr/Sr High School, Dieterich
 * Teutopolis High School, Teutopolis

Effingham

 * Effingham High School
 * St. Anthony High School

Fayette County

 * Brownstown Jr/Sr High School, Brownstown
 * Ramsey High School, Ramsey
 * St. Elmo Jr/Sr High School, St. Elmo
 * Vandalia Community High School, Vandalia

Ford County

 * Gibson City-Melvin-Sibley High School, Gibson City
 * Paxton-Buckley-Loda High School, Paxton

Franklin County

 * Benton Consolidated High School, Benton
 * Christopher High School, Christopher
 * Frankfort Community High School, West Frankfort
 * Sesser-Valier High School, Sesser
 * Thompsonville High School, Thompsonville
 * Zeigler-Royalton High School, Zeigler

Fulton County

 * Astoria High School, Astoria
 * Avon High School, Avon
 * Canton High School, Canton
 * Cuba High School, Cuba
 * Farmington Central High School, Farmington
 * Lewistown High School, Lewistown
 * Spoon River Valley High School, London Mills
 * VIT High School, Table Grove

Gallatin County

 * Gallatin High School, Junction

Greene County

 * Carrollton High School, Carrollton
 * Greenfield High School, Greenfield
 * North Greene High School, White Hall

Grundy County

 * Coal City High School, Coal City
 * Gardner-South Wilmington High School, Gardner
 * Minooka High School, Minooka
 * Morris Community High School, Morris

Hamilton County

 * Hamilton County Jr/Sr High School, McLeansboro

Hancock County

 * Hamilton High School, Hamilton
 * Illini West High School, Carthage
 * Southeastern High School, Augusta
 * Warsaw High School, Warsaw

Hardin County

 * Hardin County High School, Elizabethtown

Henderson County

 * West Central High School, Biggsville

Henry County

 * AlWood High School, Woodhull
 * Annawan High School, Annawan
 * Cambridge High School, Cambridge
 * Galva High School, Galva
 * Geneseo High School, Geneseo
 * Orion High School, Orion

Kewanee

 * Kewanee High School
 * Wethersfield High School

Iroquois County

 * Central High School, Clifton
 * Christ Lutheran High School, Buckley
 * Cissna Park High School, Cissna Park
 * Donovan Jr/Sr High School, Donovan
 * Iroquois West High School, Gilman
 * Milford High School, Milford
 * Watseka Community High School, Watseka

Defunct

 * Crescent-Iroquois High School, Crescent City (1940–2009)

Jackson County

 * Elverado High School, Elkville
 * Murphysboro High School, Murphysboro
 * Trico High School, Campbell Hill

Carbondale

 * Brehm Preparatory School
 * Carbondale Community High School

Jasper County

 * Newton Community High School, Newton

Jefferson County

 * Mount Vernon Township High School, Mount Vernon
 * Waltonville High School, Waltonville
 * Webber High School, Bluford
 * Woodlawn Community High School, Woodlawn

Jersey County

 * Jersey Community High School, Jerseyville

Jo Daviess County

 * East Dubuque High School, East Dubuque
 * Galena High School, Galena
 * River Ridge High School, Hanover
 * Scales Mound High School, Scales Mound
 * Stockton High School, Stockton
 * Warren High School, Warren

Johnson County

 * Goreville High School, Goreville
 * Vienna High School, Vienna

Kane County

 * Batavia High School, Batavia
 * Central High School, Burlington
 * Dundee-Crown High School, Carpentersville
 * Geneva Community High School, Geneva
 * Hampshire High School, Hampshire
 * Kaneland High School, Maple Park
 * South Elgin High School, South Elgin

Aurora

 * Aurora Central Catholic High School
 * Aurora Christian Schools
 * East Aurora High School
 * Illinois Mathematics and Science Academy
 * Marmion Academy
 * Rosary High School
 * West Aurora High School

Elgin

 * The Einstein Academy
 * Elgin Academy
 * Harvest Christian Academy
 * Larkin High School
 * St. Edward Central Catholic High School
 * Westminster Christian School

St. Charles

 * St. Charles East High School
 * St. Charles North High School

Defunct

 * Academy of the Cross, St. Charles (never opened, property sold in 2015)
 * Broadview Academy, La Fox (1909–May 2007)

Kankakee County

 * Bradley-Bourbonnais Community High School, Bradley
 * Grant Park High School, Grant Park
 * Herscher High School, Herscher
 * Manteno High School, Manteno
 * Momence High School, Momence
 * St. Anne Community High School, St. Anne

Kankakee

 * Bishop McNamara High School
 * Grace Christian Academy
 * Kankakee High School
 * Kankakee Trinity Academy

Kendall County

 * Newark Community High School, Newark
 * Plainfield South High School, Joliet
 * Plano High School, Plano
 * Yorkville High School, Yorkville

Oswego

 * Oswego East High School
 * Oswego High School

Knox County

 * Abingdon-Avon High School, Abingdon
 * Galesburg High School, Galesburg
 * Knoxville High School, Knoxville
 * ROWVA High School, Oneida
 * Williamsfield High School, Williamsfield

LaSalle County

 * Earlville High School, Earlville
 * LaSalle-Peru High School, LaSalle
 * Leland High School, Leland
 * Mendota Township High School, Mendota
 * St. Bede Academy, Peru
 * Seneca High School, Seneca
 * Serena High School, Serena
 * Streator Township High School, Streator

Ottawa

 * Marquette Academy
 * Ottawa Township High School

Lake County

 * Antioch Community High School, Antioch
 * Barrington High School, Barrington
 * Deerfield High School, Deerfield
 * Grant Community High School, Fox Lake
 * Highland Park High School, Highland Park
 * Lake Zurich High School, Lake Zurich
 * Lakes Community High School, Lake Villa
 * Cyd Lash Academy, Gages Lake
 * Libertyville High School, Libertyville
 * North Chicago Community High School, North Chicago
 * Round Lake High School, Round Lake
 * Adlai E. Stevenson High School, Lincolnshire
 * Vernon Hills High School, Vernon Hills
 * Warren Township High School, Gurnee
 * Wauconda High School, Wauconda

Grayslake

 * Grayslake Central High School
 * Grayslake North High School

Lake Forest

 * Lake Forest Academy
 * Lake Forest High School
 * Woodlands Academy of the Sacred Heart

Mundelein

 * Carmel High School
 * Mundelein High School

Waukegan

 * Cristo Rey St. Martin College Prep
 * Waukegan High School

Zion

 * New Tech High at Zion-Benton East
 * Zion-Benton Township High School

Defunct

 * Ferry Hall School, Lake Forest (1869–1974)

Lawrence County

 * Lawrenceville High School, Lawrenceville
 * Red Hill High School, Bridgeport

Lee County

 * Amboy High School, Amboy
 * Ashton-Franklin Center High School, Ashton
 * Dixon High School, Dixon
 * Paw Paw High School, Paw Paw

Livingston County

 * Dwight High School, Dwight
 * Flanagan-Cornell High School, Flanagan
 * Pontiac Township High School, Pontiac
 * Prairie Central High School, Fairbury
 * Tri-Point High School, Cullom
 * Woodland High School, Streator, also serves students in LaSalle County

Logan County

 * Lincoln Community High School, Lincoln
 * Hartsburg-Embden Jr/Sr High School, Hartsburg
 * Mount Pulaski High School, Mount Pulaski

Macon County

 * Argenta-Oreana High School, Argenta
 * Decatur Christian School, Forsyth
 * Maroa-Forsyth High School, Maroa
 * Meridian High School, Macon
 * Mount Zion High 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
 * 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 High School
 * Waterloo High School

Montgomery County

 * Hillsboro High School, Hillsboro
 * Lincolnwood High School, Raymond
 * Litchfield High School, Litchfield
 * Nokomis High School, Nokomis

Morgan County

 * Franklin Junior/Senior High School, Franklin
 * Meredosia-Chambersburg High School, Meredosia
 * Triopia Jr/Sr High School, Concord
 * Waverly High School, Waverly

Jacksonville

 * Illinois School for the Deaf (ISD)
 * Illinois School for the Visually Impaired (ISVI)
 * Jacksonville High School
 * Routt Catholic High School

Moultrie County

 * Arthur Christian School, Arthur
 * Okaw Valley High School, Bethany
 * Sullivan High School, Sullivan

Ogle County

 * Byron High School, Byron
 * Forreston High School, Forreston
 * Oregon High School, Oregon
 * Polo Community High School, Polo
 * Rochelle Township High School, Rochelle
 * Stillman Valley High School, Stillman Valley

Peoria County

 * Brimfield High School, Brimfield
 * Dunlap High School, Dunlap
 * Elmwood High School, Elmwood
 * Illini Bluffs High School, Glasford
 * Illinois Valley Central High School, Chillicothe
 * Limestone Community High School, Bartonville
 * Peoria Heights High School, Peoria Heights
 * Princeville High School, Princeville

Peoria

 * Manual High School
 * Peoria Christian School
 * Peoria High School (Central)
 * Peoria Notre Dame High School
 * Richwoods High School
 * Woodruff Career and Technical Center

Defunct

 * Academy of Our Lady/Spalding Institute, Peoria (1863–1988)
 * Bergan High School, Peoria (1964–1988)

Perry County

 * DuQuoin High School, Du Quoin
 * Pinckneyville Community High School, Pinckneyville

Piatt County

 * Bement High School, Bement
 * Cerro Gordo High School, Cerro Gordo
 * DeLand-Weldon High School, De Land
 * Monticello High School, Monticello

Pike County

 * Griggsville-Perry High School, Griggsville
 * Pittsfield High School, Pittsfield
 * Pleasant Hill High School, Pleasant Hill
 * Western High School, Barry

Pope County

 * Pope County High School, Golconda

Pulaski County

 * Century High School, Ullin
 * Meridian High School, Mounds

Putnam County

 * Putnam County High School, Granville

Randolph County

 * Chester High School, Chester
 * Coulterville High School, Coulterville
 * Red Bud High School, Red Bud
 * Sparta High School, Sparta
 * Steeleville High School, Steeleville

Richland County

 * Richland County High School, Olney

Rock Island County

 * Alleman High School, Rock Island
 * Moline High School, Moline
 * Riverdale High School, Port Byron
 * Rock Island High School, Rock Island
 * Rockridge High School, Taylor Ridge
 * Sherrard High School, Sherrard (also serves students in Mercer County)
 * United Township High School, East Moline

St. Clair County

 * Berean Christian School, Fairview Heights
 * Cahokia High School, Cahokia Heights
 * Collinsville High School, Collinsville
 * Dupo High School, Dupo
 * Freeburg Community High School, Freeburg
 * Lebanon High School, Lebanon
 * Marissa Jr/Sr High School, Marissa
 * Mascoutah Community High School, Mascoutah
 * New Athens High School, New Athens
 * O'Fallon Township High School, O'Fallon

Belleville

 * Althoff Catholic High School
 * Belleville High School-East
 * Belleville High School-West

East St. Louis

 * East St. Louis Senior High School
 * SIUE East St. Louis Charter High School

Saline County

 * Carrier Mills-Stonefort High School, Carrier Mills
 * Eldorado High School, Eldorado
 * Galatia High School, Galatia
 * Harrisburg High School, Harrisburg

Sangamon County

 * Auburn High School, Auburn
 * Glenwood High School, Chatham
 * New Berlin High School, New Berlin
 * Pawnee High School, Pawnee
 * Pleasant Plains High School, Pleasant Plains
 * Riverton High School, Riverton
 * Rochester High School, Rochester
 * Tri-City High School, Buffalo
 * Williamsville High School, Williamsville

Springfield

 * Calvary Academy
 * Douglas/Prep High School
 * Lanphier High School
 * Lutheran High School
 * Sacred Heart-Griffin High School
 * Springfield High School
 * Springfield Southeast High School

Defunct

 * Divernon High School, Divernon (c. 1900–2007)
 * Ursuline Academy, Springfield (1857–2007)

Schuyler County

 * Rushville-Industry High School, Rushville

Scott County

 * Bluffs High School, Bluffs
 * Winchester High School, Winchester

Shelby County

 * Central A&M High School, Moweaqua
 * Cowden-Herrick High School, Cowden
 * Shelbyville High School, Shelbyville
 * Stewardson-Strasburg High School, Strasburg
 * Windsor Jr/Sr High School, Windsor

Stark County

 * Stark County High School, Toulon

Stephenson County

 * Dakota Junior Senior High School, Dakota
 * Lena-Winslow High School, Lena
 * Orangeville High School, Orangeville
 * Pearl City High School, Pearl City

Freeport

 * Aquin Central Catholic High School
 * Freeport High School

Tazewell County

 * Deer Creek-Mackinaw High School, Mackinaw
 * Delavan High School, Delavan
 * East Peoria Community High School, East Peoria
 * Morton High School, Morton
 * Pekin Community High School, Pekin
 * Tremont High School, Tremont
 * Washington Community High School, Washington

Union County

 * Anna-Jonesboro Community High School, Anna
 * Cobden High School, Cobden
 * Dongola High School, Dongola
 * Shawnee High School, Wolf Lake

Vermilion County

 * Armstrong Township High School, Armstrong
 * Bismarck Henning High School, Bismarck
 * Georgetown-Ridge Farm High School, Georgetown
 * Hoopeston Area High School, Hoopeston
 * Oakwood High School, Fithian
 * Salt Fork High School, Catlin
 * Westville High School, Westville

Danville

 * Danville High School
 * First Baptist Christian School
 * Schlarman Academy

Defunct

 * Henning High School, Henning (1914–1964)
 * Catlin High School, Catlin
 * Jamaica High School, Sidell
 * Rossville-Alvin High School, Rossville

Wabash County

 * Mount Carmel High School, Mount Carmel

Warren County

 * Monmouth-Roseville High School, Monmouth
 * United Senior High School, Monmouth

Washington County

 * Nashville Community High School, Nashville
 * Okawville High School, Okawville

Wayne County

 * Fairfield Community High School, Fairfield
 * Wayne City High School, Wayne City

White County

 * Carmi-White County High School, Carmi
 * Grayville Jr/Sr High School, Grayville
 * Norris City-Omaha-Enfield High School, Norris City

Whiteside County

 * Erie High School, Erie
 * Fulton High School, Fulton
 * Morrison High School, Morrison
 * Newman Central Catholic High School, Sterling
 * Prophetstown High School, Prophetstown
 * Rock Falls High School, Rock Falls
 * Sterling High School, Sterling
 * Unity Christian High School, Fulton

Will County

 * Beecher High School, Beecher
 * Bolingbrook High School
 * Furqaan Academy, Bolingbrook
 * Lincoln-Way East High School, Frankfort
 * Lockport Township High School, Lockport
 * Neuqua Valley High School, Naperville
 * Peotone High School, Peotone
 * Reed-Custer High School, Braidwood
 * Romeoville High School, Romeoville
 * Wilmington High School, Wilmington

Crete

 * Crete-Monee High School
 * Illinois Lutheran High School

Joliet

 * Joliet Catholic Academy
 * Joliet Central High School
 * Joliet West High School

New Lenox

 * Lincoln-Way Central High School
 * Lincoln-Way West High School
 * Providence Catholic High School

Plainfield

 * Plainfield Central High School
 * Plainfield East High School
 * Plainfield North High School
 * Plainfield South High School

Defunct

 * Christ Lutheran Academy (Plainfield, Illinois) (2001-2010)
 * Lincoln-Way North High School, Frankfort (Closed in 2016)

Williamson County

 * Carterville High School, Carterville
 * Herrin High School, Herrin

Johnston City

 * Project E.C.H.O. Alternative School
 * Johnston City High School

Marion

 * Crab Orchard High School
 * Marion High School

Winnebago County

 * Durand High School, Durand
 * Harlem High School, Machesney Park
 * Hononegah Community High School, Rockton
 * Pecatonica High School, Pecatonica
 * South Beloit High School, South Beloit
 * Winnebago High School, Winnebago

Rockford

 * Auburn High School
 * Boylan Catholic High School
 * Christian Life Schools
 * Guilford High School
 * Thomas Jefferson High School
 * Keith Country Day School
 * Our Lady of the Sacred Heart Academy
 * Rockford Christian Schools
 * Rockford East High School
 * Rockford Lutheran High School

Defunct

 * Rockford Central High School, Rockford (1885–1940)
 * St. Thomas Catholic High School for Boys, Rockford (1929-1963)

Woodford County

 * El Paso-Gridley High School, El Paso
 * Eureka High School, Eureka
 * Fieldcrest High School, Minonk
 * Lowpoint-Washburn High School, Washburn
 * Metamora Township High School, Metamora
 * Roanoke-Benson High School, Roanoke