N-400 at Detroit 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 Detroit Field Office
At Detroit, three other forms share the docket: N-600 (certificate of citizenship) at 6.5 to 9.0 months, I-485 (adjustment of status) at 10.5 to 19.0 months, and N-600K (citizenship under section 322) at 18.5 to 25.5 months. N-600 is the quickest. N-600K opens highest. N-400 clears in 9.0 to 11.5 months, the second-fastest of the four forms and a 2.5-month band. The N-400 floor opens exactly where N-600's ceiling closes. N-400's 2.5-month spread runs roughly 3.4 times tighter than I-485's.
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Frequently Asked Questions
How long does N-400 take at Detroit Field Office?
Current processing time for N-400 at Detroit Field Office is 9.5 months to 12 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.