N-600K at Columbus Field Office
N-600K is processed by USCIS.
Verified from USCIS on 2026-06-05
How N-600K compares to other forms at the Columbus Field Office
Three other forms run through Columbus: N-600 (certificate of citizenship) at 4.0 to 8.0 months, N-400 (naturalization) at 8.5 to 10.0 months, and I-485 (adjustment of status) at 11.0 to 23.0 months. N-600 is the fastest end-to-end. I-485 spans 12 months, the widest among the others. N-600K sits at 14.0 to 28.0 months, a 14-month spread and the highest ceiling at the office. Its 21-month midpoint runs 7.7 months above the office average. That ceiling reaches 5 months past I-485's upper bound.
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Frequently Asked Questions
How long does N-600K take at Columbus Field Office?
Current processing time for N-600K at Columbus Field Office is 13.5 months to 26.5 months, based on the latest data from USCIS.
When was N-600K processing time data last updated?
The data was last updated on 2026-06-05, sourced from USCIS.
What factors affect N-600K 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.