Ireland is they twentieth largest island in the world. It is part of Europe and is located towards the north-west of Continental Europe, to the west of Great
Ireland is divided into two parts. One is Northern Ireland that is part of Great Britain and the other is Republic of Ireland.
The key religion in Republic of Ireland is Roman Catholicism. The other religions of sects of Christianity are considerably lower in number. For details on religion see this link.
On the other hand, the religion in Northern Ireland is a mix of a number of religions. 45.6 % of the population is Non-Roman Catholic whereas 40 % are Roman Catholics and .3% people belong to other religions except Christianity.