According to the United States Census Bureau, the city has a total area of 5.7square miles (15Square kilometers), all of it land. Universal City is a city in Bexar and Guadalupe Counties in the U.S. state of Texas. It borders San Antonio to the northeast, and is adjacent to Randolph Air Force Base. The population was 14,849 at the 2000 census. Through Universal City is Pat Booker Road, the commercial thoroughfare of the city. It is part of the San Antonio Metropolitan Statistical Area.