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Processing times / N-400 /

USCIS · FORM N-400 · FIELD OFFICE BOS

N-400 at Boston MA

Application for Naturalization.

13.5–15.5 monthspublished processing time
50 of 90offices, ordered from shortest published time
July 17, 2025receipt date for a case inquiry
How USCIS describes these numbers: “We generally process cases in the order we receive them. This processing time is based on how long it took us to complete 80% of adjudicated cases over the past six months. Each case is unique, and some cases may take longer than others. Processing times should be used as a reference point, not an absolute measure of how long your case will take to be completed.”

Source: USCIS, Check Case Processing Times (N-400, Application for Naturalization, Boston MA), published September 17, 2026; data from March 2026 to August 2026. Recorded weekly by greencardline since October 17, 2026. What these numbers mean.

USCIS quarterly counts for this office

QuarterReceivedApprovedDeniedPending at end of quarter
FY2024 Q13,8543,3592838,334
FY2024 Q34,3024,0222359,144
FY2024 Q45,5154,06217810,411
FY2025 Q14,8823,27417511,777
FY2025 Q25,0904,30626612,245
FY2025 Q35,1206,05025611,253
FY2025 Q44,5543,58625312,014
FY2026 Q22,7451,49613115,855
FY2026 Q32,6881,1439817,385

Source: USCIS performance data for Form N-400 by field office (each quarter links to its file on uscis.gov). Totals across all categories of N-400 at this office. "Withheld" means USCIS suppressed a small number.

All 90 offices for N-400