The Dean of St Patrick's Cathedral is the senior cleric of the Protestant St Patrick's Cathedral, Dublin, elected by the chapter of the cathedral. The office was created in 1219 or 1220, by one of several charters granted to the cathedral by Archbishop Henry de Loundres between 1218 and 1220.

Saint Patrick's Cathedral in Dublin, Ireland, founded in 1191 as a Roman Catholic cathedral, is currently the national cathedral of the Church of Ireland. Christ Church Cathedral, also a Church of Ireland cathedral in Dublin, is designated as the local cathedral of the Diocese of Dublin and Glendalough.