McKeesport, city, Allegheny County, southwestern Pennsylvania, at the junction of the Monongahela and Youghiogheny rivers, a suburb of Pittsburgh; incorporated as a city 1890. A junior college is here. The site of the city was settled about 1755 by David McKee, for whose family it is named. The community of McKeesport was a center of antifederal protest during the Whiskey Rebellion (1794) and later became a major steel-producing center for over a century, until the mid-1980s. Population 31,012 (1980); 26,016 (1990); 24,040 (2000).
