The Chattanooga, TN-GA Metropolitan Statistical Area, as defined by the United States Office of Management and Budget, is an area consisting of six counties – three in southeast Tennessee (Hamilton, Marion, and Sequatchie) and three in northwest Georgia (Catoosa, Dade, and Walker) – anchored by the city of Chattanooga. As of the 2010 census, the MSA had a population of 528,143.