The diocesan system of the Catholic church government in Spain consists mainly of a nearly entirely Latin hierarchy of 69 territorial (arch-)dioceses:
Exempt, i.e., directly subject to the Holy See, are:
All are members of the national episcopal conference of Spain.
There is also an Apostolic Nunciature to Spain (in the national capital Madrid), into which is also vested the nunciature to Andorra.
(Excluding the current but vacant Latin titular patriarchate, above)
(Excluding mere predecessors of current sees)
The Diocese of Mondoñedo-Ferrol is a Latin diocese of the Catholic Church in Spain. It is the northernmost of the four suffragan dioceses in the ecclesiastical province of the Metropolitan Archdiocese of Santiago de Compostela, which covers Galicia in the northwest of Spain. The area had previously been home to Britonia, a settlement founded by expatriate Britons in the wake of the Anglo-Saxon invasion of Britain. Britonia was represented by the diocese referred to as Britonensis ecclesia in sources from the 6th and 7th centuries.
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 Metropolitan Archdiocese of Madrid is a Latin archdiocese of the Catholic Church in Spain. It is one of Spain's fourteen metropolitan archbishoprics. Since 12 June 2023 the archbishop of Madrid has been José Cobo Cano.
The Roman Catholic Metropolitan Archdiocese of Caracas is an ecclesiastical territory of the Roman Catholic Church in Venezuela. It was founded as the Diocese of Caracas on June 20, 1637, and was later elevated to the rank of a metropolitan see on November 27, 1803.
The Archdiocese of Pamplona and Tudela is a Latin Church archdiocese of the Catholic Church located in the cities of Pamplona and Tudela in Spain.
The Roman Catholic Archdiocese of Mérida is a Latin Rite Metropolitan Archdiocese in western Venezuela.
The Metropolitan co-cathedral of Saint Mary Major of Mérida is a Roman Catholic cathedral church in Mérida, Extremadura, western Spain. Since 1994, together with the Metropolitan Cathedral of Saint John the Baptist of Badajoz, it is the seat of the Archdiocese of Mérida-Badajoz.
The Ordinariate for the Faithful of Eastern Rite in Spain is an Ordinariate (pseudo-diocese) for all non-Latin Catholic faithful living in Spain who belong to the particular Churches sui iuris of any Eastern rite immediately subject to the Holy See.