Selma is a city in Bexar, Comal, and Guadalupe counties in the U.S. state of Texas. It has a population of about 5.500 and that’s a huge increase in population for ten years before, during the 2000 census it had less than 800 residents. It was settled in 1847, mostly by German settlers. The Retama Park horse racing track is located in Selma. The town was famous as a speed trap as referenced in the Steve Earle song "Guitar Town”. An average family living in Selma makes about $62.000. Most residents work and commute to San Antonio.