The United Dioceses of Dublin and Glendalough is a diocese of the Church of Ireland in the east of Ireland. It is headed by the Archbishop of Dublin, who is also styled the Primate of Ireland. The diocesan cathedral is Christ Church Cathedral, Dublin.

The Church of Ireland is a Christian church in Ireland, and an autonomous province of the Anglican Communion. It is organised on an all-Ireland basis and is the second-largest Christian church on the island after the Roman Catholic Church. Like other Anglican churches, it has retained elements of pre-Reformation practice, notably its episcopal polity, while rejecting the primacy of the pope.