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.
Christianity in Ireland
The majority of the people of Northern Ireland are recorded as members of the various Protestant churches such as the Presbyterian Church, Church of Ireland, Methodist Church and several others. While the Catholic Church is the largest single denomination in either jurisdiction, it is smaller than the combined Protestant denominations in Northern Ireland.
In the Republic of Ireland, approximately 3% were recorded as members of various Protestant (1991). The proportion was more than 10% in 1891 – a drop to less than a third of the previous percentage. The percentage in 2011 is almost 5%.