Thornton Township High School, often simply referred to as Thornton is a public high school founded in 1899, located in Harvey, one of the South Suburbs of the city of Chicago, Illinois, USA. The school is one of three administered by Thornton Township High Schools District 205. It is occasionally confused with the two other similarly named schools in the district, Thornridge High School and Thornwood High School. A predominantly African American and Hispanic high school, Thornton is best known for its alumni who have been successful in both the Performing Arts and athletics.