Roman Catholic Diocese of Menevia

The Roman Catholic Diocese of Menevia is a Roman Catholic diocese in Swansea, Wales. It is one of three suffragan dioceses in the ecclesiastical province of Cardiff and is subject to the Archdiocese of Cardiff. There are 27,561 Catholics in the diocese which is served by 34 diocesan priests, 19 religious priests, 9 non-ordained male religious and 100 female religious. There are 34 Catholic educational institutions in the diocese.

The geographic remit consists of the City and County of Swansea, Neath and Port Talbot, and the traditional counties of Brecknockshire, Cardiganshire, Carmarthenshire, Pembrokeshire and Radnorshire - an area of 9,310 km² roughly.

The cathedra is located at St. Joseph's Cathedral, Swansea. Situated within the diocese is the Welsh National Shrine of Our Lady of Cardigan at Cardigan.

The Vicariate Apostolic of Wales was elevated to diocesan status on May 12, 1898 and had its seat at the Cathedral Church of Our Lady of Sorrows until 1987 when the Diocese of Wrexham was created. The current configuration of the Diocese of Menevia covers the area roughly that of the ancient Diocese of St David's. The current bishop is the Right Reverend Thomas Matthew Burns S.M., the eleventh incumbent, who was appointed on 16 October 2008 to succeed the Right Reverend John Mark Jabalé O.S.B.