The Roman Catholic Diocese of Lugo is a Latin Church see of the Catholic Church within Galicia, in north-western Spain, and one of the four suffragans in the ecclesiastical province of the Metropolitan Archdiocese of Santiago de Compostela.

The Archdiocese of Santiago de Compostela is a Latin Church archdiocese of the Catholic Church in Spain. It is the senior of the five districts in which the church divides Galicia in North-western Spain.