Dallas is the most populous city in the Dallas–Fort Worth metroplex, the fourth-largest metropolitan area in the United States at 7.5 million people. It is the largest city in and seat of Dallas County in the U.S. state of Texas with portions extending into Collin, Denton, Kaufman and Rockwall counties. With a 2020 census population of 1,304,379, it is the ninth most-populous city in the U.S. and the third-largest in Texas after Houston and San Antonio. Located in the North Texas region, the city of Dallas is the main core of the largest metropolitan area in the southern United States and the largest inland metropolitan area in the U.S. that lacks any navigable link to the sea. The current flag of Dallas, Texas, was adopted February 13, 1967. It is bisected horizontally by a thin white line (a fimbriation, approximately 1/27th of the flag’s height) with a dark red top and a dark blue bottom. A large, white 5-pointed star (approximately 14/15ths of the flag’s height) dominates the flag and contains the city seal in buff and black. 4K Resolution.