List of Catholic dioceses in Ireland

There are 26 dioceses in Ireland, each led by a diocesan bishop (including four Metropolitan Archdioceses).

They are organised into a single all-island Episcopal Conference that is based in the primatial see of Armagh.

A separate Apostolic Nunciature in London represents the Holy See in England, Wales and Scotland.

Another change is that the ancient see of Kilfenora has been administered by the Bishop of Galway in the province of Tuam since the late 19th Century.

There are seventeen titular sees in Ireland (of which two are united in personal union with current sees): Ardcarne, Ardmore, Ath Truim, Ceanannus Mór, Cell Ausaille, Cill Fhionnúrach (united with Galway and Kilmacduagh), Clonmacnoise (united with Diocese of Ardagh), Cluain Iraird, Cunga Féichin, Domnach Sechnaill, Duleek, Eanach Dúin, Glenndálocha, Inis Cathaig, Louth, Mageó, Roscrea, Slebte, Árd Sratha (formerly as Ardstraw an abbey nullius becoming a diocese, merged into Diocese of Cinél nEógain and Ardstraw; territory now in diocese Derry).

Catholic Dioceses on the island of Ireland. The colours indicate the ecclesiastical provinces , and the dark areas are archdioceses .
Holy Cross Church, Diocese of Kerry
Holy Trinitarian Abbey, Diocese of Limerick
St. Vincent's Church, Diocese of Kerry