Religion in the Republic of Ireland
The predominant religion in the Republic of Ireland is Christianity, with the largest church being the Roman Catholic Church. The Irish constitution says that the state may not endorse any particular religion and guarantees freedom of religion.
Religion in Northern Ireland
Christianity is the main religion in Northern Ireland. The 2011 UK census showed 42.8% Roman Catholic, 21.1% Presbyterian Church, with the Church of Ireland having 16.7% and the Methodist Church 5.0%. Members of other Christian churches comprised 5.8%, 7.9% stated they have no religion or did not state a religion, and members of non-Christian religions were 0.8%.