where is mckeesport, pennsylvania
McKeesport, Pennsylvania. McKeesport is a city in Allegheny County in the U.S. state of Pennsylvania; it is situated at the confluence of the Monongahela and Youghiogheny rivers and is part of the Pittsburgh metropolitan area. The population was 19,731 at the 2010 census. By population, it is Allegheny County's second-largest city, after Pittsburgh.