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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2121 Panoramic Circle, Suite 240, Dallas, TX 75212Telephone: (214) 653-7980 • Fax: (214) 653-7014
HSEM is not affiliated with the U.S. Department of Homeland Security (DHS). The number for DHS is 202-282-8000.
