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.
Religion and politics in the United States
In 1776 Catholics comprised less than 1% of the population of the new nation, but their presence grew rapidly after 1840 with immigration from Germany, Ireland, Italy, Poland, and elsewhere in Catholic Europe from 1840 to 1914, and also from Latin America in the 20th century. Catholics now comprise 25% to 27% of the national vote, with over 68 million members today. 85% of today's Catholics report their faith to be "somewhat" to "very important" to them.