The Archdiocese of San Antonio (Latin: Archidioecesis Sancti Antonii) is an archdiocese of the Catholic Church in the United States. It encompasses 27,841 square miles (72,110 km) in the U.S. state of Texas. Its population was 1,148,253 in 2025. The archdiocese includes the city of San Antonio and the following counties: Val Verde, Edwards, Real, Kerr, Gillespie, Kendall, Comal, Guadalupe, Gonzales, Uvalde, Kinney, Medina, Bexar, Wilson, Karnes, Frio, Atascosa, and Bandera, and the portion of McMullen County north of the Nueces River.
On August 28, 1874, the Diocese of Galveston was divided, and the northern territory was canonically erected by the Holy See as the Roman Catholic Diocese of San Antonio. Originally part of the Ecclesiastical Province of New Orleans, it was subsequently elevated on August 3, 1926, to a metropolitan archdiocese.
