San Antonio, officially the City of San Antonio, is a city in and the county seat of Bexar County, Texas, United States. The city is the seventh-most populous in the United States, the second-largest in the Southern United States, and the second-most populous in Texas after Houston. San Antonio is the largest city of the San Antonio–New Braunfels metropolitan statistical area. Commonly called Greater San Antonio, the metropolitan area had a population of 2,601,788 based on the 2020 U.S. census estimates, making it the 24th-largest metropolitan area in the United States and third-largest in Texas.