Peoria Heights High School, or PHHS, is a public four-year high school located at 508 East Glen Avenue in Peoria Heights, Illinois, a village in Peoria County, in the Midwestern United States. PHHS is part of Peoria Heights Community Unit School District 325, which serves the community of Peoria Heights and a small section of Peoria, and also includes Peoria Heights Grade School. The campus is adjacent to the city of Peoria, and serves a mixed city and village residential community.