West Mifflin, Pennsylvania

West Mifflin is a borough in Allegheny County, Pennsylvania, United States, located southeast of Pittsburgh. The population was 19,589 at the 2020 census. It is named after Thomas Mifflin, the first governor of Pennsylvania and a U.S. Founding Father.

Although the borough is heavily residential, it is home to one of America's oldest traditional amusement parks, Kennywood Park. Other employers include the advanced naval nuclear propulsion technology research and development facility, Bettis Atomic Power Laboratory, monorail manufacturer Bombardier, US Steel's Mon Valley Works–Irvin Plant, Community College of Allegheny County's South Campus, and the Allegheny County Airport.