Roman Catholic Archdiocese of Cardiff

The Roman Catholic Archdiocese of Cardiff (Latin: Archidioecesis Cardiffensis; Welsh: Archesgobaeth Caerdydd) is an archdiocese of the Latin Rite of the Roman Catholic Church which covers the south-east portion of Wales and the county of Herefordshire in England. The Metropolitan Province of Cardiff Wales and Herefordshire therefore covers all of Wales and part of England. Cardiff's suffragan dioceses are the Diocese of Menevia and the Diocese of Wrexham.

The origin of the modern diocese can be traced to 1840 when the Apostolic Vicariate of the Welsh District was created out the Western District of England and Wales. The Welsh District consisted the whole of Wales and the county of Herefordshire. When Pope Pius IX judged that the time was right to re-establish the Catholic hierarchy in Wales and England in 1850, the southern half of the Welsh District became the Diocese of Newport and Menevia. In 1895, boundaries were redrawn, and the territory covering Glamorgan, Monmouthshire and Herefordshire was named the Diocese of Newport. Finally, in 1916, without further adjustment of boundaries, the territory was raised to the status of an archdiocese, and given the title Archdiocese of Cardiff. The Episcopal Seat is now located in Cardiff, at St David's Cathedral.

The current ecclesiastical terrority of the diocese comprises the local government areas of Cardiff, Bridgend, Vale of Glamorgan, Newport, Torfaen, Blaenau Gwent, Monmouthshire, Merthyr Tydfil, Rhondda Cynon Taff and Herefordshire. Altogether there are 61 parishes. On 19 April 2011, George Stack was appointed to succeed Peter Smith, who was translated to Southwark in 2010. He was installed as Archbishop on 20 June 2011.