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.
Demographics of the Republic of Ireland
The Republic of Ireland is a predominantly Christian country. The majority are Roman Catholic, although parts of County Donegal in Ulster, especially East Donegal and Inishowen, have a significant Protestant minority. However, the number of people who declare themselves Catholic has been declining in recent years and the number of people who are practising Catholics is smaller than the declared number. As of the 2016 census, 78.3% were Catholic, a drop of 5.8% since 2011. Conversely, irreligion has almost doubled since 2011 with 9.8% declaring 'No Religion' in 2016, overtaking Protestantism as the second largest group in the state. The various Protestant and other Christian faiths represent 5.6%, Islam 1.3%, other religions 2.4% and 2.6% gave no answer.