Dallas /ˈdæləs/ is the ninth most populouscity in the United States and the third most populous city in the state of Texas. TheDallas-Fort Worth metroplex is the largest metropolitan area in the South and fourth-largest metropolitan area in the United States. The bulk of the city is in Dallas County, of which it is the county seat. However, slices of the city are located inCollin, Denton, Kaufman, and Rockwallcounties. The city had a population of 1,197,816 in 2010, according to the United States Census Bureau.