Which forms go with Form N-600?

Form N-600 at a glance

Of the 90 offices USCIS lists for Form N-600, Charlotte Amalie VI posts the shortest time, 3 to 4 months, and Memphis TN the longest, 15.5 to 52.5 months (1.3 to 4.4 years).

The last change ImmigraMate recorded to the posted range for N-600 at Cincinnati OH was on September 17, 2026. It now reads 4 to 7.5 months.

N-600 is the Application for Certificate of Citizenship. N-600: fee, documents and who can file

Forms decided at a local field office, where which office you are assigned to changes the answer by months.

USCIS publishes the time by which 80% and 93% of cases were completed. Confirm on USCIS's processing times page.

Questions about N-600 processing times

How long is Form N-600 taking right now?

For Cincinnati OH, USCIS currently posts 4 to 7.5 months on Form N-600. These are the figures USCIS published in October 2026. Of the 90 offices USCIS lists for Form N-600, Charlotte Amalie VI posts the shortest time, 3 to 4 months, and Memphis TN the longest, 15.5 to 52.5 months (1.3 to 4.4 years).

How much does Form N-600 cost?

The USCIS filing fee for Form N-600 is $1,385.

N-600: fee, documents and who can file

What if my N-600 is taking longer than the posted time?

Once your case is older than the upper end of the posted range, 7.5 months for Cincinnati OH, USCIS accepts a case inquiry about it as outside normal processing times. Check your case status first: a recent update may already answer the question.
What each case status means
If a case inquiry does not move it, you can ask your member of Congress to contact USCIS about the case for you.
How a congressional inquiry works