The Weirton-Steubenville Metropolitan Statistical Area, as defined by the United States Census Bureau, is part of the Pittsburgh Tri-State area (CSA). Weirton-Steubenville consists of two counties in the Northern Panhandle of West Virginia and one in Ohio, anchored by the cities of Weirton, West Virginia, and Steubenville, Ohio. As of the 2000 census, the MSA had a population of 132,008 (though a July 1, 2009 estimate placed the population at 120,929).