In the 2022 census,
69% (3.5 million) of the population identified as Catholic.
The proportion of the population who reported themselves to be Roman Catholic fell by 4 per cent to 69 per cent between 2016 and last year, according to the latest census results.
The next largest group after Catholic was “no religion” at 14%. The number with no religion increased by 62 per cent to nearly three-quarters of a million (736,210), which represented some 14 per cent of the population.
The second largest Christian denomination, the Church of Ireland (Anglican), declined in membership for much of the twentieth century, but remained largely static (at 2% of the population) between the 2016 and 2022 census.
Other significant Protestant denominations are the Presbyterian Church in Ireland, followed by the Methodist Church in Ireland.
The country’s Orthodox Christian, Hindu and Muslim populations have experienced significant growth in recent years, due chiefly to immigration
Orthodox Christianity (100,165) is the fastest growing religion in Ireland, and accounts for 1% of the population, due chiefly to immigration
Islam is another faith with a large population (81,930). The number of Hindus more than doubled from 13,729 to 33,043.
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