Welcome to Dallas County!
Dallas County is a county in the U.S. state of Texas. As of the 2010 census, the population was 2,368,139. It is Texas’ second-most populous county and the ninth-most populous in the United States. Its county seat is Dallas, which is also Texas’ third-largest city and the ninth-largest city in the United States.
Dallas County is included in the Dallas–Fort Worth–Arlington, TX Metropolitan Statistical Area (colloquially referred to as the Dallas-Fort Worth Metroplex).