Fort Worth is a city in the U.S. state of Texas. It is the county seat of Tarrant County, covering nearly 350 sqmi into four other counties: Denton, Johnson, Parker, and Wise. According to a 2022 United States census estimate, Fort Worth's population was 956,709, the 5th-most populous in the state and the 13th-most populous in the United States. Fort Worth is the city in the Dallas–Fort Worth–Arlington metropolitan area, which is the fourth-most populous metropolitan area in the United States, and the most populous in Texas.