8 CFR § 337.9 - Effective date of naturalization.

---
identifier: "/us/cfr/t8/s337.9"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "8 CFR § 337.9 - Effective date of naturalization."
title_number: 8
title_name: "Aliens and Nationality"
section_number: "337.9"
section_name: "Effective date of naturalization."
chapter_name: "DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "C"
subchapter_name: "NATIONALITY REGULATIONS"
part_number: "337"
part_name: "OATH OF ALLEGIANCE"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "8 U.S.C. 1103, 1443, 1448; 8 CFR part 2."
cfr_part: "337"
---


# 337.9 Effective date of naturalization.

(a) An applicant for naturalization shall be deemed a citizen of the United States as of the date on which the applicant takes the prescribed oath of allegiance in an administrative ceremony or in a ceremony conducted by an appropriate court under § 337.8 of this chapter.

(b) [Reserved]

[56 FR 50500, Oct. 7, 1991, as amended at 60 FR 37804, July 24, 1995; 66 FR 32147, June 13, 2001; 76 FR 53803, Aug. 29, 2011]