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.
Catholic unionist
A 2011 survey by the Northern Ireland Life and Times survey found that 52% of Northern Irish Catholics respondents favoured Northern Ireland remaining part of the United Kingdom over a united Ireland.