The Roman Catholic Archdiocese of Guadalajara is a Roman Catholic archdiocese based in the Mexican city of Guadalajara, Jalisco. It currently covers an area of 20,827 km². The diocese was erected on July 13, 1548 and was elevated to Archdiocese on January 26, 1863.

The Roman Catholic Diocese of Tepic ) is a suffragan Latin diocese in the ecclesiastical province of the Metropolitan Archdiocese of Guadalajara in western Mexico.