The Diocese of San Angelo is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in Central and West Texas in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of San Antonio.

The Archdiocese of San Antonio is a Latin Church archdiocese of the Catholic Church in the United States. It encompasses 27,841 square miles (72,110 km2) in the U.S. state of Texas. The Roman Catholic Archdiocese of San Antonio had a self-reported 2018 population of 796,954, up from 728,001 in 2014. 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, Bandera County, and the portion of McMullen County north of the Nueces River.