N-400 at Oklahoma City 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 Oklahoma City Field Office
Oklahoma City also handles N-600 (certificate of citizenship) at 11.0 to 14.0 months, I-485 (adjustment of status) at 11.5 to 25.0 months, and N-600K (citizenship under section 322) at 48.5 to 49.0 months. I-485 has a 13.5-month spread, the widest among the others. N-600K sits in a half-month band far above. N-400 clears in 10.5 to 14.5 months, the fastest opening of the four forms here. N-400's 4-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 Oklahoma City Field Office?
Current processing time for N-400 at Oklahoma City Field Office is 10.5 months to 14 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.