Sylvan Hills High School (SHHS) is an accredited comprehensive public high school located in the city of Sherwood, Arkansas, United States, serving grades nine through twelve. Sylvan Hills is one of six high schools administered by the Pulaski County Special School District (PCSSD). Prior to 1956, Sylvan Hills School instructed students through grade nine, until local citizens gathered to approve expanding the school to a senior high, resulting in its first graduating class in 1959.