Dallas is a city in the U.S. state of Texas and Dallas County's largest city and seat, with portions reaching into the counties of Collin, Denton, Kaufman and Rockwall. With a population estimated at 1,345,076 people. It is the ninth most populous city in the United States and the third in Texas, after Houston and San Antonio. Located in North Texas, Dallas City is the center of Southern America's largest metropolitan region, and the largest inland metropolitan area in the U.S. that lacks any navigable access to the sea. Its dynamic economy is dominated by sectors of defence, financial services, information technology, telecommunications, and transport. Dallas hosts 9 Fortune 500 businesses. Dallas is also home to Americas favorite "dallas Cowboys" national football league.