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February 6, 2023

Naturalization: Policy Overview and Selected Trends

Naturalization is the process by which a foreign national
becomes a U.S. citizen under requirements established in
the Immigration and Nationality Act (INA). In 2021,
approximately 24 million naturalized U.S. citizens were
residing in the United States, representing 53% of the
foreign-born population.
Naturalization is voluntary and 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, U.S.
citizens may sponsor a broader range of family members
for permanent residence than lawful permanent residents
(LPRs, also known as green card holders; foreign nationals
authorized to live permanently in the United States), and the
immediate relatives of U.S. citizens (as defined in the INA)
are not subject to numerical limits.
Generally, in order to naturalize, a foreign national must be
an LPR, meet certain U.S. residence and physical presence
requirements, demonstrate knowledge of U.S. history and
civics and English language ability, have good moral
character, and show attachment to the U.S. Constitution by
taking the Oath of Allegiance in a public ceremony.
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 preceding their
application. During at least half that time (30 months), the
individual must have been physically present in the United
States. LPRs who are married to U.S. citizens and have
been 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 also 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 contains certain
statutory bars to GMC (e.g., conviction of certain crimes).
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, exemptions are available to
individuals who are unable to comply with these
requirements because of a physical or developmental
disability or mental impairment.
Process
Individuals apply to naturalize by filing an Application for
Naturalization (Form N-400) with USCIS with required
fees (currently $640 plus an $85 biometric fee). Next,
applicants undergo biometric screening, during which
USCIS collects an applicant's fingerprints, photograph, and
signature. Applicants then 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
become U.S. citizens after taking the Oath of Allegiance.
The Oath may be administered by USCIS in an
administrative ceremony or by a federal judge in a judicial
ceremony.
Dual Citizenship, Expatriation, and
Revocation
An individual who naturalizes in the United States may
retain the citizenship of another country if that country
permits it. The United States has no authority to prohibit
another country from continuing to treat an individual as its
citizen.
A native-born or naturalized U.S. citizen may lose their
citizenship by committing certain expatriating acts if those
acts are committed with the intention of relinquishing U.S.
citizenship. These include voluntary naturalization in a
foreign country after age 18, making a formal declaration of
allegiance to a foreign country after age 18, serving in the
armed forces of a foreign country engaged in hostilities
against the United States, and serving in the armed forces of
a foreign country as an officer. An individual may also
voluntarily renounce their U.S. citizenship before a U.S.
diplomatic or consular officer abroad (e.g., because the
individual wishes to run for elected office in another
country).
A naturalized citizen may have his or her citizenship
revoked in federal court on the basis that he or she procured

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