Universal City is a city in Bexar County, Texas, United States, with a small portion in Guadalupe County. It is a suburb of San Antonio to the northeast, and is adjacent to Randolph Air Force Base. The city also borders Schertz, Texas to its east, Selma to its north, Live Oak to its west, and Converse to its southwest. The population was 19,720 at the 2020 census. It is part of the San Antonio Metropolitan Statistical Area.