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.
Republic of Ireland
The Church of Ireland, at 2.7% of the population, is the second largest Christian denomination. Membership declined throughout the twentieth century, but experienced an increase early in the 21st century, as have other small Christian denominations. Significant Protestant denominations are the Presbyterian Church and Methodist Church. Immigration has contributed to a growth in Hindu and Muslim populations. In percentage terms, Orthodox Christianity and Islam were the fastest growing religions, with increases of 100% and 70% respectively.