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Congressional Research Service
Inforrning the legislative debate since 1914


S


                                                                                       Updated September  16, 2025

Naturalization: Policy Overview and Selected Trends


Naturalization is the voluntary process by which a foreign
national becomes a U.S. citizen. In 2024, approximately 26
million naturalized U.S. citizens were residing in the United
States, representing about 51% of the total foreign-born
population.

U.S. citizenship affords certain rights, benefits, and
eligibility; including eligibility for a U.S. passport, the right
to vote and run for elected office, eligibility for certain civil
service and law enforcement jobs, and protection from
deportation. In addition, under the Immigration and
Nationality Act's (INA's) family-based immigration
system, U.S. citizens may sponsor a broader range of family
members  to immigrate than lawful permanent residents
(LPRs). LPRs  are foreign nationals authorized to live
permanently in the United States. Unlike the relatives of
LPRs, the immediate relatives of U.S. citizens (spouses and
unmarried minor children, and parents of adult U.S.
citizens) are not subject to numerical limits.

Requirements for naturalization are enumerated in the INA.
Generally, in order to naturalize, a foreign national must be
an LPR, meet certain U.S. residence and physical presence
requirements, demonstrate English language ability and
knowledge  of U.S. history and civics, have good moral
character, and show attachment to the principles of the U.S.
Constitution. Individuals must be at least 18 to naturalize;
children derive citizenship through their parents. U.S.
Citizenship and Immigration Services (USCIS), a
Department of Homeland  Security (DHS) agency,
adjudicates naturalization applications.

Eligibility  Requirements
U.S. Residence   and Physical Presence
Generally, an LPR becomes eligible to naturalize after five
years of continuous U.S. residence. During at least half that
time (30 months), the individual must have been physically
present in the United States. LPRs who have been married
to a U.S. citizen for at least three years may naturalize after
three years of U.S. residence and 18 months of physical
presence.

The INA  contains special provisions for the naturalization
of noncitizen members of the U.S. Armed Forces. Those
who  apply while in service or within six months of
discharge are exempt from residence and physical presence
requirements. Those who serve during designated periods
of military hostilities may naturalize without having first
been an LPR.

Good   Moral  Character
Naturalization applicants must demonstrate that they have
been persons of good moral character (GMC). GMC  is


determined on a case-by-case basis by USCIS based on the
totality of the circumstances, considering factors such as
community  involvement, employment  history, and absence
or presence of criminal history. The INA and Code of
Federal Regulations contain certain bars to establishing
GMC   (e.g., conviction of certain crimes).

In August 2025, USCIS issued a policy memorandum
directing USCIS officers to account for an alien's positive
attributes and not simply the absence of misconduct for
GMC   determinations. Officers are to place a greater
emphasis on positive attributes or contributions, such as
community  involvement/contributions, family
caregiving/ties, education, employment, length of
residence, and compliance with tax obligations. The
guidance advises greater scrutiny of disqualifying behavior
and action, including bars to GMC and other acts (e.g.,
habitual traffic infractions). USCIS is to also consider
evidence of genuine rehabilitation of wrongdoing, such as
payment  of overdue child support or taxes.

English and  Civics Knowledge
Naturalization applicants must demonstrate an ability to
read, write, and speak English and take a civics exam that
demonstrates understanding of U.S. history and
government. Individuals aged 50 and older with qualifying
U.S. residence may be eligible for modifications to these
requirements. In addition, individuals who are unable to
comply  with these requirements because of a physical or
developmental disability or mental impairment are exempt.

Process
Individuals apply to naturalize by filing an Application for
Naturalization (Form N-400) with USCIS with required
fees (currently $760 for paper filing or $710 for online
filing). Reduced fees and fee waivers are available to
certain applicants. Those qualifying based on military
service do not pay a fee.

Next, applicants undergo biometric screening, during which
USCIS  collects an applicant's fingerprints, photograph, and
signature. In a departure from USCIS policy since 1991, in
August 2025, USCIS  announced it would exercise its
statutory authority to conduct personal investigations of
naturalization applicants, known as neighborhood
investigations, for which it may request testimonial letters
from neighbors, employers, co-workers, and business
associates.

Applicants must complete an interview with a USCIS
officer in which they answer questions about their
application and background and complete their civics and
English tests. Those who pass their interviews and exams


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