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 See also List of high schools in Greater St. Louis List of school districts in Illinois References External links List of high schools in Illinois from SchoolTree.org List of schools in Illinois from Illinois State Board of Education Ryan Janna Huang, seniors at palatine High School in Illinois scored a perfect 36 on their ACT High Illinois