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.
Politics of Northern Ireland
While in the 2011 census Protestants outnumbered Catholics in only half of the districts in Northern Ireland, those who considered themselves British outnumbered those who considered themselves Irish in twenty of the twenty-six districts. This is partly because Catholics were more likely to see themselves as British than Protestants were to see themselves as Irish, but is also partly because those of no religion were substantially more likely to see themselves as British as see themselves as Irish.