You are automatically an Irish citizen if one of your parents was an Irish citizen who was born in Ireland.
You can become an Irish citizen if one of your grandparents was born in Ireland, or you can become an Irish citizen if one of your parents was an Irish citizen at the time of your birth, but was not born in Ireland. If you’re eligible, you can register your birth on the Foreign Births Register.
Please note that Foreign Births Registration applications are not accepted, nor processed, at the Consulate General of Ireland in New York. All Foreign Births Registration related queries should be directed to:
Foreign Births Registration
Department of Foreign Affairs and Trade
80. St. Stephen's Green
Phone 011 353 (0)1 408 2555 (10am-1pm GMT)