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 8% of the population. One hundred years earlier, in 1901, they represented only 4.2% of the population. In 1981, 8.7% of the population of England and Wales were Catholic. In 2009, an Ipsos Mori poll found that 9.6%, or 5.2 million persons were Catholic in England and Wales. Sizable populations include North West England where one in five is Catholic, a result of large-scale Irish migration in the nineteenth century as well as the high number of English recusants in Lancashire.