If your mother or father is a U.S. citizen by birth, or was naturalized before you reached your 18th birthday, you may not need to file Form N-400 as you may already be a U.S. citizen.
General provision: select this box if you have been a lawful permanent resident (LPR) of the United States for at least 5 years.
Signature: USCIS will not accept a stamped or typewritten name in place of any signature on this application.
All pages: you must include all pages when you file Form N-400, even if the pages are blank.
Ink: type or print legibly in black ink.
Questions: if a question does not apply to you, type or print "N/A" unless otherwise directed.
| Question | Answer |
|---|---|
| Form Name | Form N-400 |
| Form Length | 14 pages |
| Fillable? | Yes |
| Fillable fields | 488 |
| Avg. time to fill out | 60+ min |
| Edition | 01/20/25 |
| Issuing agency | U.S. Citizenship and Immigration Services |
| Matches the agency's file | Yes, checked October 4, 2026 |
| Other names | N-400, N400, Form N-400, Form N400, Application for Naturalization |
| Official source | Form N-400 (Rev 01/20/25), U.S. Citizenship and Immigration Services |
N400 Form isn’t the one you’re looking for?