The Archbishop of Armagh is an archiepiscopal title which takes its name from the city of Armagh in Northern Ireland. Since the Reformation, there have been parallel apostolic successions to the title: one in the Roman Catholic Church and the other in the Church of Ireland. The archbishop of each denomination also holds the title of Primate of All Ireland.

Armagh is the county town of County Armagh and a city in Northern Ireland, as well as a civil parish. It is the ecclesiastical capital of Ireland – the seat of the Archbishops of Armagh, the Primates of All Ireland for both the Roman Catholic Church and the Church of Ireland. In ancient times, nearby Navan Fort was a pagan ceremonial site and one of the great royal capitals of Gaelic Ireland. Today, Armagh is home to two cathedrals and the Armagh Observatory, and is known for its Georgian architecture.