Michael Geoffrey St Aubyn Jackson is a Church of Ireland Anglican bishop. Since 2011, he has served as the Archbishop of Dublin and Bishop of Glendalough in the Church of Ireland. He is also the co-chairman of the Porvoo Communion of Anglican and Lutheran churches.

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.