The Diocese of Zamora is a Latin Church ecclesiastical territory or diocese of the Catholic Church. The diocese is a suffragan in the ecclesiastical province of the metropolitan Archdiocese of Morelia. It was erected on 26 January 1863. It has two co-cathedrals in the episcopal see of Zamora, Michoacán: Cathedral of the Immaculate Conception of Mary and Cathedral of Our Lady of Guadalupe

The Archdiocese of Morelia is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in western central Mexico. It was erected on 11 August 1536 as the Diocese of Michoacán.