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 Church in England and Wales
At the 2001 United Kingdom census, there were 4.2 million Catholics in England and Wales, some eight per cent of the population. One hundred years earlier, in 1901, they represented only 4.8 per cent of the population. In 1981, 8.7 per cent of the population of England and Wales were Catholic. In 2009, an Ipsos Mori poll found that 9.6 per cent, or 5.2 million persons of all ethnicities were Catholic in England and Wales. Sizeable populations include North West England where one in five is Catholic, a result of large-scale Irish immigration in the nineteenth century as well as the high number of English recusants in Lancashire.