Citizen at birth abroad
A person born outside the United States may have acquired citizenship at birth through one or both US citizen parents if the statutory conditions were met.
United States citizenship
Find the US citizenship pathway that fits your facts.
Start by checking whether you may already be a citizen. If not, compare the principal naturalization routes and every core requirement.
Source standard: USCISContent reviewed: 26 August 2026Not legal advice
Naturalization may be the wrong application if you are already a citizen
Birth in the United States or citizenship through a US citizen parent can mean you need proof of citizenship—not Form N-400.
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First check whether you may already be a US citizen
Citizenship through a parent depends on the law in effect at the relevant time, the child’s birth date, the parents’ citizenship and residence history, legal parentage, and sometimes custody or legitimation.
Automatic citizenship after birth
Under current INA 320 rules, a child generally must be under 18, an LPR, and reside in the United States in the legal and physical custody of a US citizen parent.
Child residing abroad
Some children living outside the United States can apply under INA 322 through a US citizen parent—and in some cases qualifying grandparent residence.
Proof rather than naturalization
Someone who already acquired or derived citizenship may use Form N-600 for a Certificate of Citizenship. A child residing abroad generally uses Form N-600K.
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Principal naturalization pathways
Five-year LPR route
For an applicant who has been a lawfully admitted permanent resident for at least five years and meets residence, presence, conduct, English, civics and oath requirements.
Official route ↗Three-year spouse route
For an LPR married to and living in marital union with the same US citizen spouse for the qualifying period. The spouse must have been a citizen for that period and remain one through naturalization.
Official route ↗Military service
INA 328 and INA 329 provide special rules for honorable service, including different residence and LPR requirements depending on whether service occurred during designated hostilities.
Official route ↗Spouse employed abroad
A spouse of a US citizen employed abroad by certain US employers or organizations may qualify under INA 319(b) without the usual continuous-residence or physical-presence periods.
Official policy ↗03
General five-year eligibility checklist
Be at least 18 when filing Form N-400.
Have been lawfully admitted as an LPR and retain that status through naturalization.
Maintain continuous residence in the United States for the required five-year statutory period.
Be physically present in the United States for at least 30 months—913 days—during those five years.
Live for at least three months in the state or USCIS district with jurisdiction over the application, subject to special rules.
Show good moral character during the statutory period and through the Oath; earlier conduct may also be considered.
Demonstrate required English ability and knowledge of US history and government unless an exception applies.
Show attachment to constitutional principles and take the Oath of Allegiance, unless a lawful modification or waiver applies.
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Continuous residence, physical presence and travel
These are separate tests. Continuous residence asks whether the United States remained your principal dwelling; physical presence counts the days you were actually inside the country.
SituationWhy it matters
Trip shorter than 6 months
Usually does not create the statutory presumption of a residence break, but the full facts still matter.
Trip of 6 months to under 1 year
Creates a rebuttable presumption that continuous residence was interrupted. Evidence may overcome it.
Trip of 1 year or more
Generally breaks continuous residence unless a specific preservation or statutory exception applies.
Qualifying employment abroad
Some applicants can preserve residence by an approved Form N-470; eligibility is narrow and advance timing matters.
Early filing
Many five-year and three-year applicants may file up to 90 calendar days before completing the continuous-residence period, but not before satisfying every other applicable requirement.
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English and civics requirements
English
Most applicants must demonstrate an ability to read, write, speak and understand basic English. Speaking is assessed during the interview; reading and writing use test sentences.
Civics
The officer asks civics questions orally. The applicable version normally depends on the Form N-400 filing date.
2008 civics test
Up to 10 oral questions from a list of 100; answer 6 correctly to pass.
2025 civics test
20 oral questions from a list of 128; answer 12 correctly to pass.
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Good moral character and issues needing individual review
USCIS evaluates the statutory period and may examine earlier conduct when it relates to present character. Some conduct creates permanent or conditional bars; other conduct is weighed case by case.
Do not rely on dismissal or expungement alone.
USCIS Policy Manual: Good moral character ↗Naturalization forms require broad disclosure. Obtain certified records and qualified legal advice when criminal or immigration history may be involved.
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Testing exceptions, disability accommodations and the Oath
50/20 and 55/15 English exceptions
An applicant who is at least 50 with 20 years as an LPR, or at least 55 with 15 years as an LPR, may take civics in their language with an interpreter but still must take civics.
65/20 special consideration
An applicant who is at least 65 with at least 20 years as an LPR receives special consideration for the civics test. Use the USCIS materials designated for the applicable test version.
Medical disability exception
Form N-648 may support an exception to English, civics or both when a medically determinable physical or developmental disability or mental impairment meets USCIS requirements. Illiteracy alone is not enough.
Reasonable accommodations
USCIS can provide disability accommodations without waiving the underlying requirement—for example, sign-language assistance or accessible testing arrangements.
Oath modification or waiver
Limited modifications may be available for religious or conscientious objections. An oath waiver may be available where a qualifying disability prevents understanding or communicating the oath.
Private preliminary self-check
Find the route your answers point toward
This guided screen separates core gaps from facts that need checking. Answers stay in this browser tab and are not sent to CitizenReady.
Step 1 of 90%
Ready for the official next step?
Verify your result with USCIS before filing.
Use the government eligibility tool, review the current Form N-400 instructions and consider accredited legal help for complex facts.