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.
Islam in the Republic of Ireland
The documented history of Islam in Ireland dates to the 1950s. The number of Muslims in Ireland has increased since the 1990s, mostly through immigration. According to the 2016 Irish census the number of Muslims resident in the Republic was 63,443.