Like other Irish churches, the Church of Ireland did not divide when Ireland was partitioned in the 1920s, and it continues to be governed on an all-Ireland basis.Today the Church of Ireland is, after the Catholic Church, the second-largest Christian church in all of Ireland and the third largest in Northern Ireland after the Catholic and Presbyterian churches.
Christianity is and has been the largest religion in Ireland.
Most Christian churches are organized on an all-Ireland basis, including both the Republic of Ireland and Northern Ireland.
The counties which retain the highest proportion of Protestants tend to be those which started off with a large proportion.
In Northern Ireland, only counties Londonderry, Tyrone and Armagh have experienced a significant loss of relative Protestant population, though at a lesser rate than in the Republic.
Proportion of respondents to the Ireland census 2011 or the Northern Ireland census 2011 who stated they were Catholic.
Areas in which Catholics are in the majority are blue.
While the Catholic Church is the largest single denomination in either jurisdiction, it is smaller than the combined Protestant denominations in Northern Ireland.
In the Republic of Ireland, approximately 3% were recorded as members of various Protestant (1991).
The church is led by four archbishops and twenty-three bishops; however, because there have been amalgamations and absorptions, there are more than twenty-seven dioceses.
For instance, the diocese of Cashel has been joined with the diocese of Emly, Waterford with Lismore, and Ardagh with Clonmacnoise.
There about 3,000 secular clergy—parish priests, administrators, curates, chaplains, and professors in colleges.