Quote Originally Posted by O'Callaghan View Post
You don't have to give up British citizenship to get Irish citizenship unless both claims to citizenship are from Northern Ireland. Only one citizenship or the other can be claimed from NI, but British and Irish citizenship are not otherwise mutually exclusive.
Anyone born anywhere on the island of Ireland is, under Irish law, entitled to Irish citizenship and, thus, an Irish passport. As far as I am aware the Passport Office down on Molesworth Street does not ask any citizen if he/she holds a UK passport as a condition of issuing an Irish Passport. To my sure and certain knowledge there are a great many individuals in NI who hold both UK and Irish Passports, and indeed a fair number in the Republic as well.

It may be that in the less than three years I have resided in the United States Irish (or EU) laws may have changed, but as far as I am aware there is no general prohibition on people in NI holding both passports.