N-400 at Buffalo Field Office
Form N-400, Application for Naturalization, is filed with USCIS to apply for US citizenship.
Verified from USCIS on 2026-06-05
How N-400 compares to other forms at the Buffalo Field Office
Buffalo processes I-485 (adjustment of status), N-600 (certificate of citizenship), and N-600K (citizenship under section 322) alongside N-400. I-485 spans 7.5 to 12.5 months, the widest range. N-600 sits at 9.0 to 12.0 and N-600K at 9.5 to 11.5. N-400 clears in 11.0 to 12.0 months, the slowest opening at the office and the tightest 1-month band of the four forms. From the N-400 floor to the office's overall ceiling stretches 1.5 months. Across the office's upper bounds, the N-400 ceiling joins 11.5, 12 in the count.
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Frequently Asked Questions
How long does N-400 take at Buffalo Field Office?
Current processing time for N-400 at Buffalo Field Office is 11.5 months to 13 months, based on the latest data from USCIS.
When was N-400 processing time data last updated?
The data was last updated on 2026-06-05, sourced from USCIS.
What factors affect N-400 processing time?
Processing times vary based on application volume, case complexity, security checks, and the completeness of submitted documentation. Times shown are estimates and individual cases may differ.