Where do I find US naturalization records for an Irish ancestor?
Everything turns on one date: 27 September 1906. Before it, any court of record in the United States could grant citizenship, from federal courts down to county and local courts, and the records stay with that court, its local archive, or the National Archives for federal courts. Early papers can be thin: a name, a country of origin, a date, little more. From that date the forms were standardised, a duplicate copy went to the federal immigration bureau, and petitions become rich: birth date and place, arrival date, ship, spouse and children. For the later period, start with the US Citizenship and Immigration Services Genealogy Program, which searches the federal files and holds the C-Files covering 1906 to 1956. One gap to expect: from 1855 to 1922 most married women took citizenship from their husbands automatically, so an Irish great-grandmother may have no papers of her own.
Useful pages: Irish in USA · The Irish surnames map · Trace your Irish roots · Coming home · Irish around the world
Sources
- US Citizenship and Immigration Services: Genealogy Program and naturalization records, uscis.gov
- National Archives and Records Administration (US): passenger lists, census clues and naturalization guidance, archives.gov
More in Irish in USA and the diaspora
- What is the Foreign Births Registration, and who qualifies?
- What documents do I need for a Foreign Births Registration application?
- Does my child qualify if I register my own foreign birth after they are born?
- What is the difference between citizenship by descent and the Foreign Births Register?
- Can I claim Irish citizenship through a great-grandparent?