McKeesport is a city in Allegheny County, Pennsylvania, USA, at the confluence of the Monongahela and Youghiogheny Rivers and is part of the Pittsburgh Metro Area. The population was 24,040 at the 2000 census. It is the 2nd largest city in Allegheny County behind only Pittsburgh. McKeesport apartments for rent comparison page shows most up to date rent information on McKeesport apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.