Can citizens of Northern Ireland obtain Irish passports without being part of a United Ireland?

Yes, citizens of Northern Ireland can obtain Irish passports without being part of a United Ireland ¹ ² ³: - The Irish Nationality and Citizenship Act of 1956 gave people born in Northern Ireland the right to claim Irish citizenship - The Good Friday Agreement of 1998 confirmed that people born in Northern Ireland could choose to be either British or Irish citizens - If you are born in Northern Ireland after 2005, you can claim Irish citizenship if your parent is Irish, British or has lived on the island of Ireland for at least three out of the four years immediately before your birth - If one of your grandparents was born in Ireland, but neither of your parents was born in Ireland, you can become an Irish citizen by having your birth registered in the Foreign Births Register