The Dean of Christ Church Cathedral, Dublin is dean and head of the chapter of the Cathedral of the Holy Trinity, commonly called Christ Church Cathedral, which is the cathedral church of the United Diocese of Dublin and Glendalough in the Church of Ireland. The dean is appointed by the Church of Ireland Archbishop of Dublin. Aspects of the cathedral administration are overseen by the Cathedral Board, which the Dean chairs with both a regular and a casting vote.

Christ Church Cathedral, more formally The Cathedral of the Holy Trinity, is the cathedral of the United Dioceses of Dublin and Glendalough and the cathedral of the ecclesiastical province of the United Provinces of Dublin and Cashel in the (Anglican) Church of Ireland. It is situated in Dublin, Ireland, and is the elder of the capital city's two medieval cathedrals, the other being St Patrick's Cathedral.