The Diocese of Corpus Christi is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in southern Texas in the United States.

The Archdiocese of Galveston–Houston is a Latin Church ecclesiastical jurisdiction—an archdiocese—of the Catholic Church in the United States. The archdiocese covers a portion of Southeast Texas, and is the metropolitan see of the ecclesiastical province covering east-Texas. The archdiocese was erected in 2004, having been a diocese since 1959 and the "Diocese of Galveston" since 1847. It is the second metropolitan see in Texas after the Archdiocese of San Antonio.