Sunny Hills High School (SHHS) is a public high school located in Fullerton, California, United States. Established in 1959, it is part of the Fullerton Joint Union High School District. The campus, consisting mostly of single-story open plan buildings, is situated on 42 acres (170,000 m2) in western Fullerton. The school contains the Sunny Hills Performing Arts Center, a notable venue in Orange County for classical performances.