Selma is a city in Bexar, Comal, and Guadalupe counties in Texas, United States. It is part of the San Antonio metropolitan statistical area. Its population was 10,952 at the 2020 census, up from 5,540 at the 2010 census. Selma was settled by German and Polish immigrants in the mid-1800s. The Retama Park horse-racing track is located in Selma.