Warilla High School is a government-funded co-educational comprehensive secondary day school, located in Barrack Heights, a suburb of the City of Shellharbour, in the Illawarra region of New South Wales, Australia. Established in 1965, the school caters for approximately 1,250 students in 2018, from Year 7 to Year 12, of whom eight percent identified as Indigenous Australians and 16 percent were from a language background other than English. The school is operated by the NSW Department of Education.