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.
Northern Ireland
Official voting figures, which reflect views on the "national question" along with issues of candidate, geography, personal loyalty and historic voting patterns, show 54% of Northern Ireland voters vote for unionist parties, 42% vote for nationalist parties and 4% vote "other". Opinion polls consistently show that the election results are not necessarily an indication of the electorate's stance regarding the constitutional status of Northern Ireland. Most of the population of Northern Ireland are at least nominally Christian, mostly Roman Catholic and Protestant denominations. Many voters (regardless of religious affiliation) are attracted to unionism's conservative policies, while other voters are instead attracted to the traditionally leftist Sinn Féin and SDLP and their respective party platforms for democratic socialism and social democracy.