Dermot Pius Farrell KC*HS (born 22 November 1954) is an Irish Roman Catholic prelate who has served as Archbishop of Dublin since 2021.

[1] He returned to Ireland in 1989, serving as a curate in Tullamore and lecturing in moral theology at St Patrick's College, Maynooth.

[5] Farrell retired as President of St Patrick's College in 2007 and returned to pastoral ministry in the Diocese of Meath, when he was appointed parish priest in Dunboyne.

[6] Farrell was appointed Bishop of Ossory by Pope Francis on 3 January 2018, and consecrated by the Archbishop of Dublin, Diarmuid Martin, on 11 March in St Mary's Cathedral, Kilkenny.

[7][8][9] Farrell became a member of the standing committee of the Irish Catholic Bishops' Conference, and subsequently its Financial Secretary in March 2019.