Religion in the Republic of Ireland

The predominant religion in the Republic of Ireland is Christianity, with the largest denomination being the Catholic Church. The Constitution of Ireland says that the state may not endorse any particular religion and guarantees freedom of religion.

In the 2022 census, 69.1% (3.5 million) of the population identified as Catholic.^[1] The next largest group after Catholic was "no religion" at 14%.^[1] The Eastern Orthodox Church was Ireland’s second largest Christian denomination, with 2.1% of the population identifying as Orthodox Christians. It has been the country's fastest-growing religion since 1991.^[2][3][4] The third largest Christian denomination, the Church of Ireland (Anglican), declined in membership for much of the 20th century, but remained largely static (at 2% of the population) between the 2016 and 2022 census.^[5] Other significant Protestant denominations are the Presbyterian Church in Ireland, followed by the Methodist Church in Ireland. The country’s Muslim and Hindu populations have experienced significant growth in recent years.