Dallas County is a county located in the U.S. state of Texas. As of the 2010 census, the population was 2,368,139. It is the second-most populous county in Texas and the ninth-most populous in the United States. Its county seat is Dallas, which is also the third-largest city in Texas and the ninth-largest city in the United States.
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Administrative Office: Records Building - 500 Elm Street, 7th Floor, Suite 7200, Dallas, TX 75202Office: (214) 653-6100 • Fax: (214) 653-6315
