Who Is a U.S. Citizen?

Understand birthright citizenship, naturalization, citizenship documents, and the official resources people use when status matters.

A practical guide to who is a U.S. citizen, how citizenship is acquired or naturalized, and where to verify official status and records.

Government works best when people can see how power is used and where decisions are made.

What U.S. Citizenship Means

U.S. citizenship is a legal status that connects a person to the United States through rights, duties, documents, and protections. Citizens can vote in federal elections if otherwise eligible, hold a U.S. passport, petition for certain family members to immigrate, serve on juries, and receive full constitutional protection against loss of citizenship without due process.

Citizenship is not the same thing as residence. A lawful permanent resident may live and work in the United States, but citizenship adds political membership and a stronger legal bond to the country.

Birthright Citizenship People born in the United States are generally citizens at birth under the Fourteenth Amendment.

Citizenship Through Parents Some people born abroad acquire citizenship through one or both U.S. citizen parents.

Naturalization Eligible lawful permanent residents may apply to become citizens through USCIS.

How Citizenship Is Proved

Most people prove citizenship with a birth certificate, U.S. passport, Consular Report of Birth Abroad, Certificate of Citizenship, or Certificate of Naturalization. The right document depends on where the person was born, how citizenship was acquired, and which agency is asking for proof.

USCIS citizenship and naturalization
U.S. passports
Replace naturalization or citizenship document

When Citizenship Questions Come Up

Citizenship status matters for passports, voting eligibility, federal jobs, immigration petitions, some benefits, jury service, school and scholarship forms, and identity records. When a question is serious or time-sensitive, use official government instructions and keep copies of every receipt, notice, certificate, and confirmation number.

How to use this page

Use Who Is a U.S. Citizen? without getting lost.

Citizenship questions are document questions as much as civics questions: proof, records, passports, naturalization, voting, and eligibility all matter.

Start with who has power Most government questions begin with the institution, office, law, or level of government that controls the decision.

Follow the process Power usually moves through steps: proposal, review, vote, rule, decision, appeal, or enforcement.

Verify before acting Use official sources for current forms, deadlines, legal text, records, and contact instructions.

Connect local and national Federal, state, local, and tribal governments can divide responsibility over the same public issue.

Official starting points

Use these sources to check current text, records, deadlines, forms, votes, rules, or public notices.

USCIS Citizenship and Naturalization
Travel.State.gov Passports
USA.gov citizenship and immigration

Quick Link Guide

One-click access to other sections of the government education guide.

Guide To Government
Start with branches, powers, checks, records, and practical resources.

Congress
Lawmaking, representation, committees, and oversight.

Executive Branch
Presidency, agencies, and presidential actions.

Judicial Branch
Courts, cases, and court resources.

Federal Budget
Revenue, spending, deficits, debt, and shutdowns.

Elections
Voting, participation, and official election resources.

Government Resources
Official public service and self-help resources.

Glossary
Definitions, tooltips, and related pages.