- This is a list of high schools in the state of Illinois.
- Adams County
- Central High School, Camp Point
- Liberty High School, Liberty
- Quincy Notre Dame High School, Quincy
- Quincy Senior High School, Quincy
- Seymour High School, Payson
- Unity High School, Mendon
- Alexander County
- Cairo High School, Cairo
- Egyptian High School, Tamms
- Bond County
- Greenville High School, Greenville
- Mulberry Grove High School
- Boone County
- Belvidere High School, Belvidere, Illinois
- Belvidere North High School, Belvidere, Illinois
- North Boone High School, Poplar Grove, Illinois
- Brown County
- Brown County High School, Mount Sterling, Illinois
- Bureau County
- Albizzle Thomas High School, Spring Valley
- Bureau Valley High School, Manlius
- Depue High School, Depue
- Hall High School, Spring Valley
- La Moille High School, La Moille
- Ohio Community 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 High School, Virginia
- Champaign County
- Centennial High School, Champaign
- Champaign Central High School, Champaign
- Fisher Junior-Senior High School, Fisher
- Heritage High School, Broadlands
- Mahomet-Seymour High School, Mahomet
- Rantoul Twp High School, Rantoul
- St. Joseph-Ogden High School, St. Joseph
- St. Thomas More, Champaign
- Unity High School, Tolono
- University Laboratory High School, Urbana
- Urbana High School, Urbana
- Christian County
- Edinburg High School, Edinburg
- Morrisonville High School, Morrisonville
- Pana Senior High School, Pana
- Taylorville High School, Taylorville
- South Fork High School, Kincaid
- 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 Community High School, Louisville
- Clinton County
- Carlyle High School, Carlyle
- Central Community High School, Breese
- Mater Dei High School, Breese
- Wesclin High School, Trenton
- Coles County
- Charleston High School, Charleston
- Mattoon High School, Mattoon
- Oakland High School, Oakland
- Cook County
- Amundsen High School, Chicago
- Victor J. Andrew High School, Tinley Park
- Alan B. Shepard High School, Palos Heights
- Argo Community High School, Summit
- Aspen High School, Robbins
- Austin Career Education Center, Chicago
- Austin Community High School, Chicago
- Bais Yaakov High School, Chicago
- Benito Juarez Community Academy, Chicago
- Best Practice High School, Chicago
- Bloom High School, Chicago Heights
- Bloom Trail High School, Chicago Heights
- Bogan High School, Chicago
- Bowen High School, Chicago
- Bremen High School, Midlothian
- Bronzeville Alternative Academy, Chicago
- Brooks College Prep Academy, Chicago
- Brother Rice High School, Chicago
- Buffalo Grove High School, Buffalo Grove
- Calumet Career Prep Academy, Chicago
- Dr Pedro Albizu Campos High School, Chicago
- Carl Sandburg High School, Orland Park
- Carver Military Academy, Chicago
- The Chicago Academy for the Arts, Chicago
- Chicago Christian High School, Palos Heights
- Chicago Discovery Academy, Chicago
- Chicago High School for Agricultural Sciences, Chicago
- Chicago International Charter School Northtown Academy, Chicago
- Chicago Military Academy, Chicago
- Chicago Vocational Career Academy, Chicago
- Chicago Waldorf School, Chicago
- Chicagoland Jewish High School, Deerfield
- Christian Liberty Academy, Wheeling Township
- Clemente High School, Chicago
- Collins High School, Chicago
- James B. Conant High School, Hoffman Estates
- Corliss High School, Chicago
- Cosmopolitan Preparatory School, Chicago
- Cristo Rey Jesuit High School, Chicago
- Curie Metropolitan High School, Chicago
- De La Salle Institute, Chicago
- Dunbar Vocational Career Academy, Chicago
- DuSable High School, Chicago
- Dyett Academic Center High School, Chicago
- 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
- Englewood Technical Prep Academy, Chicago
- Evanston Township High School, Evanston
- Evergreen Park Community High School, Evergreen Park
- Farragut Career Academy, Chicago
- Fasman Yeshiva High School, Skokie
- Christian Fenger Academy High School, Chicago
- Fenwick High School, Oak Park
- Flower Career Academy, Chicago
- Foreman High School, Chicago
- Forest View Alternative School, Arlington Heights
- William Fremd High School, Palatine
- Gage Park High School, Chicago
- Garfield Alternative High School, Chicago
- Glenbrook North High School, Northbrook
- Glenbrook South High School, Glenview
- Gordon Tech High School, Chicago
- Ray Graham Training Center, Chicago
- Guerin College Preparatory High School, River Grove
- Hales Franciscan High School, Chicago
- Hancock College Preparatory High School, Chicago
- Harlan Community Academy, Chicago
- Harold L. Richards High School, Oak Lawn
- Harper High School, Chicago
- John Hersey High School, Arlington Heights
- Hillcrest High School, Country Club Hills
- Hirsch Metropolitan High School, Chicago
- Hoffman Estates High School, Hoffman Estates
- Holy Cross High School, River Grove
- Holy Trinity High School, Chicago
- Homewood-Flossmoor High School, Flossmoor
- Hubbard High School, Chicago
- Hyde Park Career Academy, Chicago
- Ida Crown Jewish Academy, Chicago
- Illiana Christian High School, Lansing
- Immaculate Heart of Mary High School, Westchester
- Jones College Prep High School, Chicago
- Jubilee Academy, Chicago
- Julian High School, Chicago
- Kelly High School, Chicago
- Kelvyn Park High School, Chicago
- John F. Kennedy High School, Chicago
- Kenwood Academy, Chicago
- Lake View High School, Chicago
- Lane Technical College Prep High School, Chicago
- Las Casas Occupational High School, Chicago
- Latin School of Chicago, Chicago
- Latino Youth Alternative High School, Chicago
- Lemont High School, Lemont
- Leo Catholic High School, Chicago
- Lincoln Park High School, Chicago
- Lindblom Math and Science Academy, Chicago
- Lourdes High School, Chicago
- Loyola Academy, Wilmette
- Lubavitch Boys High School, Chicago
- Lubavitch Girls High School, Chicago
- Lubavitch Mesivta of Chicago, Chicago
- Luther East High School, Lansing
- Luther High School North, Chicago
- Luther High School South, Chicago
- Lyons Township High School, La Grange
- Maine East High School, Park Ridge
- Maine North High School, Des Plaines
- Maine South High School, Park Ridge
- Maine West High School, Des Plaines
- Manley Career Academy, Chicago
- Maria High School, Chicago
- Marian Catholic High School, Chicago Heights
- Marist High School, Chicago
- John Marshall Metropolitan High School, Chicago
- Stephen Tyng Mather High School, Chicago
- Morgan Park Academy, Chicago
- Morgan Park High School, Chicago
- 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
- Mother Theodore Guerin High School, River Grove
- Mother McAuley Liberal Arts High School, Chicago
- Mount Assisi Academy, Lemont
- Mount Carmel High School, Chicago
- Nazareth Academy, La Grange Park
- New Trier High School, Winnetka
- Niles East High School, Skokie
- Niles North High School, Skokie
- Niles West High School, Skokie
- Noble Street Charter High School, Chicago
- North Cook Young Adult Academy, Des Plaines
- North Lawndale Charter High School, Chicago
- North Shore Country Day School, Winnetka
- Northside College Preparatory High School, Chicago
- Northside Learning Center, Chicago
- Northwest Suburban Academy Arlington Heights
- Notre Dame High School for Boys, Niles
- Notre Dame High School for Girls, Chicago
- Oak Forest High School, Oak Forest
- Oak Lawn Community High School, Oak Lawn
- Oak Park and River Forest High School, Oak Park
- Our Lady of Tepeyac High School, Chicago
- Palatine High School, Palatine
- Antonia Pantoja High School, Chicago
- Francis W. Parker School, Chicago
- Phoenix Military Academy, Chicago
- Prospect High School, Mount Prospect
- Prosser Career Academy, Chicago
- Providence-St. Mel, Chicago
- Proviso East High School, Maywood
- Proviso Mathematics and Science Academy, Forest Park
- Proviso West High School, Hillside
- Queen of Peace High School, Burbank
- Reavis High School, Burbank
- Regina Dominican High School, Wilmette
- Resurrection High School, Chicago
- Rich Central High School, Olympia Fields
- Rich East High School, Park Forest
- Rich South High School, Richton Park
- Rich Township High School, Park Forest
- Richards Career Academy, Chicago
- Harold L. Richards High School, Oak Lawn
- Ridgewood High School, Norridge
- Riverside Brookfield High School, Riverside
- Robeson High School, Chicago
- Rolling Meadows High School, Rolling Meadows
- Roosevelt High School, Chicago
- Roycemore School, Evanston
- St. Benedict High School, Chicago
- St. Francis de Sales High School, Chicago
- St. Gregory the Great High School, Chicago
- St. Ignatius College Preparatory School, Chicago
- St. Joseph High School, Westchester
- St. Laurence High School, Burbank
- St. Patrick High School, Chicago
- St. Rita of Cascia High School, Chicago
- St. Scholastica Academy, Chicago
- St. Thomas of Villanova Catholic Secondary School, Palatine
- St. Viator High School, Arlington Heights
- Carl Sandburg High School, Orland Park
- Schaumburg High School, Schaumburg
- Schurz High School, Chicago
- Senn High School, Chicago
- Seton Academy, South Holland
- Alan B. Shepard High School, Palos Heights
- Simeon Career Academy, Chicago
- Singing Winds Waldorf School, Riverside
- 64 Crown Jewish Academy, Chicago
- South Shore Community Academy, Chicago
- Southside Occupational Academy, Chicago
- Spalding High School, Chicago
- Amos Alonzo Stagg High School, Palos Hills
- Steinmetz Academic Centre High School, Chicago
- Streamwood High School, Streamwood
- Sullivan High School, Chicago
- Taft High School, Chicago
- Telshe High School, Chicago
- Thomas Kelly High School,Chicago
- Thornridge High School, Dolton
- Thornton Fractional North High School, Calumet City
- Thornton Fractional South High School, Lansing
- Thornton Township High School, Harvey
- Thornwood High School, South Holland
- Tilden Career Community Academy, Chicago
- Tinley Park High School, Tinley Park
- Trinity High School, River Forest
- Universal School, Bridgeview
- University of Chicago Laboratory Schools, Chicago
- Urban Prep Charter Academy for Young Men, Chicago
- Vanguard School, Arlington Heights
- Vaughn Occupational High School, Chicago
- Von Steuben Metropolitan Science Center, Chicago
- Walter Payton College Prep, Chicago
- Walther Lutheran High School, Melrose Park
- George Washington High School, Chicago
- Wells Community Academy High School, Chicago
- West Leyden High School, Northlake
- West Town Academy, Chicago
- Westinghouse Career Academy, Chicago
- Wheeling High School, Wheeling
- York Alternative High School, Chicago
- Young Women's Leadership Charter School of Chicago, Chicago
- Whitney Young High School, Chicago
- Crawford County
- Hutsonville High School, Hutsonville
- Oblong High School, Oblong
- Robinson High School, Robinson
- Palestine High School, Palestine
- Cumberland County
- Cumberland High School, Toledo
- Neoga Junior-Senior High School, Neoga
- DeKalb County
- DeKalb High School, DeKalb
- Genoa-Kingston High School, Genoa
- Hiawatha Junior and Senior High School, Kirkland
- Hinckley-Big Rock High School, Hinkley
- Indian Creek High School, Shabbona
- Sandwich Community High School, Sandwich
- Somonauk High School, Somonauk
- Sycamore High School, Sycamore
- DeWitt County
- Blue Ridge High School, Farmer City
- Clinton Community High School, Clinton
- Douglas County
- Arcola High School, Arcola
- Arthur Junior-Senior High School, Arthur
- Tuscola High School, Tuscola
- Villa Grove High School, Villa Grove
- DuPage County
- Addison Trail High School, Addison
- Bartlett High School, Bartlett
- Benet Academy, Lisle
- Downers Grove North High School, Downers Grove
- Downers Grove South High School, Downers Grove
- Driscoll Catholic High School, Addison
- Fenton High School, Bensenville
- Glenbard East High School, Lombard
- Glenbard North High School, Carol Stream
- Glenbard South High School, Glen Ellyn
- Glenbard West High School, Glen Ellyn
- Hinsdale Central High School, Hinsdale
- Hinsdale South High School, Darien
- Immaculate Conception High School, Elmhurst
- Indian Plains Alternative High School, Aurora
- Islamic Foundation School, Villa Park
- Lake Park High School, Roselle
- Lisle High School, Lisle
- Montini Catholic High School
- Naperville Central High School, Naperville
- Naperville North High School, Naperville
- St. Francis High School, Wheaton
- Timothy Christian School, Elmhurst
- Waubonsie Valley High School, Aurora
- West Chicago Community High School, West Chicago
- Westmont High School, Westmont
- Wheaton Academy, West Chicago
- Wheaton North High School, Wheaton
- Wheaton Warrenville South High School, Wheaton
- Willowbrook High School, Villa Park
- York Community High School, Elmhurst
- Edgar County
- Chrisman High School, Chrisman
- Kansas High School, Kansas
- Paris High School, Paris
- Shiloh High School, Hume
- Edwards County
- Edwards County High School, Albion
- Effingham County
- Altamont High School, Altamont
- Beecher City Junior-Senior High School, Beecher City
- Dieterich Junior-Senior High School, Dieterich
- Effingham High School, Effingham
- St. Anthony High School, Effingham
- Teutopolis High School, Teutopolis
- Fayette County
- Brownstown Junior-Senior High School, Brownstown
- Ramsey High School, Ramsey
- St. Elmo Junior-Senior 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
- Ezra Christian School, West Frankfort
- 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 Senior High School, Avon
- Canton High School, Canton
- Cuba High School, Cuba
- Farmington High School, Farmington
- Lewistown High School, Lewistown
- Spoon River Valley Senior High School, London Mills
- VIT Senior 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 Township High School, Gardner
- Minooka High School, Minooka
- Morris High School, Morris
- Hamilton County
- Hamilton County Junior/Senior High School, McLeansboro
- Hancock County
- Hamilton High School, Hamilton
- Illini West High School, Carthage
- Nauvoo-Colusa Senior High School, Nauvoo
- Southeastern High School, Augusta
- Warsaw Junior-Senior 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 Community High School, Cambridge
- Geneseo High School, Geneseo
- Galva Junior-Senior High School, Galva
- Kewanee High School, Kewanee
- Orion High School, Orion
- Wethersfield Junior-Senior High School, Kewanee
- Iroquois County
- Central High School, Clifton
- Christ Lutheran High School, Buckley
- Cissna Park High School, Cissna Park
- Crescent-Iroquois High School, Crescent City
- Donovan Junior-Senior High School, Donovan
- Iroquois West High School, Gilman
- Milford High School, Milford
- Watseka Comm High School, Watseka
- Jackson County
- Brehm Preparatory School, Carbondale
- Carbondale Community High School, Carbondale
- Elverado High School, Elkville
- Murphysboro High School, Murphysboro
- Trico High School, Campbell Hill
- Jasper County
- Newton Community High School, Newton
- Jefferson County
- Mount Vernon Township High School, Mount Vernon
- Waltonville High School, Waltonville
- Webber Township 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, Elizabeth
- 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
- Aurora Central Catholic High School, Aurora
- Aurora Christian School, Aurora
- Batavia High School, Batavia
- Broadview Academy, Lafox
- Central High School, Burlington
- Central School Program, Elgin
- Dundee-Crown High School, Carpentersville
- East Aurora High School, Aurora
- Elgin Academy, Elgin
- Fox Valley Lutheran Academy, Elgin
- Geneva Community High School, Geneva
- Gifford Street High School, Elgin
- Hampshire High School, Hampshire
- Illinois Mathematics and Science Academy, Aurora
- Kaneland High School, Maple Park
- Larkin High School, Elgin
- Marmion Academy, Aurora
- Rosary High School, Aurora
- South Elgin High School, South Elgin
- St. Charles East High School, St. Charles
- St. Charles North High School, St. Charles
- St. Edward Central Catholic High School, Elgin
- West Aurora High School, Aurora
- Kankakee County
- Bishop McNamara High School, Kankakee
- Bradley-Bourbonnais Community High School, Bradley
- Grace Baptist Academy, Kankakee
- Grant Park High School, Grant Park
- Herscher High School, Herscher
- Indian Oaks Academy, Manteno
- Kankakee High School, Kankakee
- Manteno Township High School, Manteno
- Momence High School, Momence
- St. Anne Community High School, St. Anne
- Kankakee Trinity Academy, Kankakee
- Kendall County
- Newark Community High School, Newark
- Oswego East High School, Oswego
- Oswego High School, Oswego
- Plainfield South High School, Joliet
- Plano High School, Plano
- Yorkville High School, Yorkville
- Knox County
- Abingdon High School, Abingdon
- Galesburg High School, Galesburg
- Knoxville High School, Knoxville
- ROWVA Senior High School, Oneida
- Williamsfield High School, Williamsfield
- LaSalle County
- Earlville High School, Earlville
- LaSalle-Peru High School, LaSalle
- Leland High School, Leland
- Marquette High School, Ottawa
- Mendota Township High School, Mendota
- Ottawa High School, Ottawa
- St. Bede Academy, Peru
- Seneca High School, Seneca
- Serena High School, Serena
- Streator Township High School, Streator
- Lake County
- Antioch Community High School, Antioch
- Barrington High School, Barrington
- Carmel High School, Mundelein
- Deerfield High School, Deerfield
- Gateway School, Lake Villa
- Grant Community High School, Fox Lake
- Grayslake Central High School, Grayslake
- Grayslake North High School, Grayslake
- Highland Park High School, Highland Park
- Lakes Community High School, Lake Villa
- Lake Forest Academy, Lake Forest
- Lake Forest High School, Lake Forest
- Lake Zurich High School, Lake Zurich
- Cyd Lash Academy, Gages Lake
- Libertyville High School, Libertyville, Illinois
- Mundelein High School, Mundelein
- North Chicago Community High School, North Chicago
- Round Lake High School, Round Lake
- Saint Martin de Porres, Waukegan
- Adlai E. Stevenson High School, Lincolnshire
- Vernon Hills High School, Vernon Hills
- Warren Township High School, Gurnee
- Wauconda High School, Wauconda
- Waukegan High School, Waukegan
- Woodlands Academy of the Sacred Heart, Lake Forest
- Zion-Benton Township High School, Zion
- 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 Junior-Senior High School, Paw Paw
- Livingston County
- Dwight High School, Dwight
- Flanagan High School, Flanagan
- Pontiac High School, Pontiac [1]
- Prairie Central High School, Fairbury [2]
- Tri-Point High School, Cullom [3]
- Woodland High School, Streator
- Logan County
- Lincoln Community High School, Lincoln
- Mount Pulaski High School, Mount Pulaski
- Macon County
- Argenta-Oreana High School, Argenta
- Eisenhower High School, Decatur
- Lutheran High School, Decatur
- MacArthur High School, Decatur
- Maroa Forsyth High School, Maroa
- Meridian High School, Macon
- Mount Zion High School, Mount Zion
- Sangamon Valley High School, Niantic
- St. Teresa High School, Decatur
- Warrensburg-Latham High School, Warrensburg
- Macoupin County
- Bunker Hill High School, Bunker Hill
- Carlinville High School, Carlinville
- Gillespie High School, Gillespie
- Girard High School, Girard
- Mount Olive High School, Mount Olive
- Northwestern High School, Palmyra
- Southwestern High School, Piasa
- Staunton High School, Staunton
- Virden High School, Virden
- Madison County
- Alton Senior High School, Alton
- Civic Memorial High School, Bethalto
- Collinsville High School, Collinsville
- East Alton-Wood River High School, Wood River
- Edwardsville High School, Edwardsville
- Granite City High School, Granite City
- Highland High School, Highland
- Livingston High School, Livingston
- Madison Senior High School, Madison
- Marquette Catholic High School, Alton
- Metro-East Lutheran High School, Edwardsville
- Roxana High School, Roxana
- Triad High School, Troy
- Venice High School, Venice
- 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 [4]
- Midwest Central High School, Manito
- Havana-Easton Central, centrally located between Havana and Easton
- Massac County
- Joppa Junior & Senior High School, Joppa
- Massac County High School, Metropolis
- McDonough County
- Bushnell-Prairie City High School, Bushnell
- Industry High School, Industry
- Macomb High School, Macomb
- West Prairie High School, Sciota
- McHenry County
- Alden-Hebron High School, Hebron
- Cary-Grove High School, Cary
- Crystal Lake Central High School, Crystal Lake
- Crystal Lake South High School, Crystal Lake
- Harvard High School, Harvard
- Huntley High School, Huntley
- Harry D. Jacobs High School, Algonquin
- Johnsburg High School, Johnsburg
- Marengo High School, Marengo
- Marian Central Catholic High School, Woodstock
- McHenry East High School, McHenry
- McHenry West High School, McHenry
- Prairie Ridge High School, Crystal Lake
- Richmond-Burton High School, Richmond
- Woodstock High School, Woodstock
- Woodstock North High School, Woodstock
- McLean County
- Bloomington High School, Bloomington
- Calvary Baptist Academy, Bloomington
- Central Catholic High School, Bloomington
- Chenoa High School, Chenoa
- Cornerstone Christian Academy, Bloomington
- El-Paso-Gridley High School, Gridley
- Heyworth High School, Heyworth
- LeRoy High School, LeRoy
- Lexington High School, Lexington
- Normal Community High School, Normal
- Normal Community West High School, Normal
- Olympia High School, Stanford
- Regional Alternative School, Bloomington
- Ridgeview High School, Colfax
- Tri-Valley High School, Downs
- University High School, Normal
- Menard County
- Athens Senior High School, Athens
- Greenview High School, Greenview
- Porta High School, Petersburg
- Mercer County
- Aledo High School, Aledo
- Sherrard High School, Sherrard
- Westmer High School, Joy
- Monroe County
- Beck AVC Alternative School, Red Bud
- Columbia High School, Columbia
- Gibault Catholic High School, Waterloo
- Valmeyer High School, Valmeyer
- Waterloo High School, Waterloo
- Montgomery County
- Hillsboro High School, Hillsboro
- Lincolnwood High School, Raymond
- Litchfield High School, Litchfield
- Nokomis Junior/Senior High School, Nokomis
- Morgan County
- Illinois School for the Deaf (ISD), Jacksonville [5]
- Illinois School for the Visually Impaired (ISVI), Jacksonville [6]
- Jacksonville High School, Jacksonville
- Meredosia-Chambersburg High School, Meredosia
- Routt Catholic High School, Jacksonville
- Triopia Junior-Senior High School, Concord
- Waverly High School, Waverly
- Cole OuntyCOle highCole grade school
- Ogle County
- Byron High School, Byron
- Forreston High School, Forreston [7]
- 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
- Manual High School, Peoria
- Peoria High School (Central), Peoria
- Peoria Alternative School, Peoria
- Peoria Christian School, Peoria
- Peoria Heights High School, Peoria Heights
- Princeville High School, Princeville
- Peoria Notre Dame High School, Peoria
- Richwoods High School, Peoria
- Woodruff High School, Peoria
- Perry County
- DuQuoin High School, DuQuoin
- Pinckneyville Comm High School, Pinckneyville
- Piatt County
- Atwood Hammond High School, Atwood
- Bement High School, Bement
- Cerro Gordo High School, Cerro Gordo
- DeLand-Weldon High School, DeLand
- Monticello High School, Monticello
- Pike County
- Barry High School, Barry
- Griggsville-Perry High School, Griggsville
- Pittsfield High School, Pittsfield
- Pleasant Hill High School, Pleasant Hill
- West Pike High School, Kinderhook
- 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
- East Richland High School, Olney [8]
- West Richland High School, Noble
- 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
- United Township High School, East Moline
- St. Clair County
- Apostolic Learning Academy (K-12), Dupo
- Althoff Catholic High School, Belleville
- Belleville High School-East, Belleville
- Belleville High School-West, Belleville
- Cahokia High School, Cahokia
- Collinsville High School, Collinsville
- Dupo High School, Dupo
- East St. Louis Senior High School, East St. Louis
- Freeburg Community High School, Freeburg
- Lebanon High School, Lebanon
- Marissa Junior-Senior High School, Marissa
- Mascoutah High School, Mascoutah
- New Athens High School, New Athens
- O'Fallon Township High School, O'Fallon
- SIU Charter School of East St. Louis, East St. Louis
- Saline County
- Carrier Mills-Stonefort High School, Carrier Mills
- Galatia High School, Galatia
- Harrisburg High School, Harrisburg
- Eldorado High School, Eldorado
- Sangamon County
- Auburn High School, Auburn
- Divernon High School, Divernon
- Glenwood High School, Chatham
- Lanphier High School, Springfield
- Lutheran High School, Springfield
- New Berlin High School, New Berlin
- Pleasant Plains High School, Pleasant Plains
- Riverton High School, Riverton
- Rochester High School, Rochester
- Sacred Heart-Griffin High School, Springfield
- Springfield High School, Springfield
- Springfield Southeast High School, Springfield
- Tri-City High School, Buffalo
- Ursuline Academy, Springfield
- Williamsville High School, Williamsville
- Schuyler County
- Rushville 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
- Tower Hill High School, Tower Hill (Annexed with Pana Sr. High School, Christian County)
- Windsor Junior & Senior High School, Windsor
- Stark County
- Stark County High School, Toulon
- Stephenson County
- Aquin Central Catholic High School[9], Freeport
- Dakota Junior-Senior High School[10], Dakota
- Freeport High School (Stephenson County)|Freeport High School]], Freeport
- Lena-Winslow High School, Lena
- Orangeville High School, Orangeville
- Pearl City High School, Pearl City
- Tazewell County
- The Academy at ICC, East Peoria
- Dee-Mack 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 High School, Anna
- Cobden High School, Cobden
- Dongola High School, Dongola
- Shawnee High School, Wolf Lake
- Vermilion County
- Armstrong High School, Armstrong
- Bismarck-Henning High School, Bismarck
- Catlin High School, Catlin
- Danville High School, Danville
- Georgetown-Ridge Farm High School, Georgetown
- Hoopeston Area High School, Hoopeston
- Jamaica High School, Sidell
- Oakwood High School, Fithian
- Rossville-Alvin High School, Rossville
- Schlarman High School, Danville
- Westville High School, Westville
- Wabash County
- Mount Carmel High School, Mount Carmel
- Warren County
- United Senior High School, Monmouth (for Alexis)
- Monmouth-Roseville High School, Monmouth
- Yorkwood High School, Monmouth
- Washington County
- Nashville Community High School, Nashville
- Okawville Junior/Senior High School, Okawville
- Wayne County
- Cisne High School, Cisne
- Fairfield Community High School, Fairfield
- Wayne City High School, Wayne City
- White County
- Carmi-White County High School, Carmi
- Norris City-Omaha-Enfield High School, Norris City
Grayville Jr. Sr. High School, Grayville- Whiteside County
- Erie High School, Erie
- Fulton High School, Fulton
- Unity Christian High School, Fulton
- Morrison High School, Morrison
- Newman Central Catholic School, Sterling
- Prophetstown High School, Prophetstown
- Rock Falls High School, Rock Falls
- Sterling High School, Sterling
- Will County
- Beecher High School, Beecher
- Bolingbrook High School, Bolingbrook
- Christ Lutheran Academy, Plainfield
- Crete-Monee High School, Crete
- Joliet Catholic Academy, Joliet
- Joliet Central High School, Joliet
- Joliet West High School, Joliet
- Lincoln-Way Central High School, New Lenox
- Lincoln-Way East High School, Frankfort
- Lincoln-Way North High School, Frankfort
- Lockport Township High School, Lockport
- Neuqua Valley High School, Naperville
- Peotone High School, Peotone
- Plainfield Central High School, Plainfield
- Plainfield East High School, Plainfield
- Plainfield North High School, Plainfield
- Providence Catholic High School, New Lenox
- Reed-Custer High School, Braidwood
- Romeoville High School, Romeoville
- Wilmington High School, Wilmington
- Williamson County
- Carterville High School, Carterville
- Crab Orchard High School, Marion
- Grace Christian School, West Frankfort
- Herrin High School, Herrin
- Johnston City High School, Johnston City
- Marion High School, Marion
- Project E.C.H.O., Johnston City
- Winnebago County
- Auburn High School, Rockford
- Boylan Catholic High School, Rockford
- Durand High School, Durand
- East High School, Rockford
- Guilford High School, Rockford
- Harlem High School, Machesney Park
- Hononegah Community High School, Rockton
- Keith Country Day School, Rockford
- Rockford Lutheran High School, Rockford
- Pecatonica High School, Pecatonica
- Rockford Christian High School, Rockford
- Christian Life High School, Rockford
- Rockford East High School, Rockford
- South Beloit High School, South Beloit
- Thomas Jefferson High School
- Winnebago High School, Winnebago
- 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
- See also
- List of school districts in Illinois
- External links
- List of high schools in Illinois from SchoolTree.org
- Source: Wikipedia; it is used under the GNU Free Documentation License. You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.
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