Catholic Church in Ireland
In the 2016 Irish census 78.3% of the population identified as Catholic in Ireland; numbering approximately 3.7 million people. Unlike Catholics in the United States, Ireland has seen a significant decline from the 84.2% who identified as Catholic in the 2011 census.
Christianity in Ireland
More specifically religious anti-Protestantism in Ireland was evidenced by the acceptance of the Ne Temere decrees in the early 20th century, whereby the Catholic Church decreed that all children born into mixed Catholic-Protestant marriages had to be brought up as Catholics. Protestants in Northern Ireland had long held that their religious liberty would be threatened under a 32-county Republic of Ireland, due to that country's Constitutional support of a "special place" in government for the Catholic Church. This was amended in the Republic of Ireland in 1970 however.