West Mifflin

West Mifflin is a borough in Allegheny County, Pennsylvania, United States, located southeast of downtown Pittsburgh. The population was 20,313 at the 2010 census. It is named after Thomas Mifflin, 1st Governor of Pennsylvania, signer of the United States Constitution, and 1st Quartermaster General of the United States Army. Although the borough is heavily residential, it is home to one of America's oldest traditional amusement parks, Kennywood Park; the fourth largest shopping mall in the region, Century III; advanced naval nuclear propulsion technology research and development facility,... Bettis Atomic Power Laboratory; monorail manufacturer Bombardier; US Steel's Irvin Plant; Community College of Allegheny County's South Campus; the Allegheny County Airport; and various other businesses and industries. According to the United States Census Bureau, the borough has a total area of 14.4 square miles , of which 14.2 square miles is land and 0.3 square miles , or 1.80%, is water. The landscape is largely hilly and wooded, and the borough's eastern boundary is contiguous with the Monongahela River three separate times.
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