Jourdanton is a city in and the county seat of Atascosa County, Texas, United States. The population is 4,094. It is part of the San Antonio metropolitan statistical area. The mayor is Robert "Doc" Williams. The city manager is Bobby J. Martinez. The police chief is Eric Kaiser. The fire chief is Jay Fojtik.

Atascosa County is a county located in the U.S. state of Texas. It is in South Texas and its county seat is Jourdanton.