N-400Application for Naturalization
Used by lawful permanent residents who meet the residence, physical presence, good moral character, and English/civics requirements to become U.S. citizens.
Filing Overview
Where to File
Processing Times
| Office | Region | Subtype | Estimate | Inquiry date |
|---|---|---|---|---|
| Nebraska Service Center | National | Naturalization | 8.5 months | Apr 15, 2025 |
| Baltimore Field Office | Maryland | Naturalization | 10 months | Mar 1, 2025 |
| Washington DC Field Office | DC · VA · MD | Naturalization | 14.5 months | Oct 15, 2024 |
Frequently Asked Questions
The current USCIS filing fee for Form N-400 (Application for Naturalization) is $760. Always confirm the fee on the official USCIS page before submission, as fees are adjusted periodically.
Form N-400 mailing addresses depend on the applicant's category and state of residence. Use the address listed on this page or on the official USCIS "Where to File" page for N-400. USCIS uses different addresses for USPS and for express couriers (FedEx, UPS, DHL).
Processing times for Form N-400 vary by office and case subtype. Use the processing-times table on this page to see current estimates by office, refreshed daily from USCIS.gov.