Upper St. Clair is a township with home rule status in southern Allegheny County, Pennsylvania, United States, located approximately 8 miles south of Downtown Pittsburgh. It is known for being an affluent suburb with a nationally recognized school district. As of the 2020 census, the township population was 21,160. Around 9% of the township's area is dedicated to 14 parks and multiple fields, totaling approximately 733 acres.