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- Birthright citizenship is mainly a federal law question
- Federal statutes also describe who is a citizen at birth
- The leading Supreme Court precedent still shapes the modern understanding
- The phrase subject to the jurisdiction is where most disputes concentrate
- Some U.S. births have special rules or well known exceptions
- Children of accredited diplomats are treated differently under federal guidance
- Birth in U.S. territories can depend on which territory it is
- Nationality and citizenship are not always the same status in U.S. law
- Citizenship by descent is a separate set of federal rules
- State birth records matter as evidence but they do not create citizenship
- Proof of citizenship often involves federal documents and federal review
- Certificates of citizenship are another federal form of documentation
- Sources
Key Facts
- Federal level: The Fourteenth Amendment says people born in the United States and subject to its jurisdiction are U.S. citizens.
- Federal level: Federal statute also lists people who are U.S. citizens at birth, including many people born in the United States.
- Federal level: The U.S. Supreme Court decision in United States v. Wong Kim Ark is a key case interpreting birthright citizenship under the Fourteenth Amendment.
- Federal level: Children born in the United States to accredited foreign diplomats generally are not treated as “subject to the jurisdiction” of the United States for citizenship at birth.
- Federal level: U.S. Department of State guidance describes narrow, long-recognized exceptions to birthright citizenship, including children of foreign sovereigns or ministers and children born during hostile occupation.
- Federal and state: States issue birth certificates and other vital records, but U.S. citizenship status is determined by federal constitutional and statutory law.
- Federal level: People born in Puerto Rico and subject to U.S. jurisdiction are U.S. citizens at birth under federal law.
- Federal level: People born in American Samoa and Swains Island are generally U.S. nationals but not U.S. citizens at birth under federal statute.
As of February 2026, this article reflects publicly available federal constitutional text, federal statutes, and published agency guidance, which may change over time through legislation or court decisions.
Birthright citizenship is mainly a federal law question
Citizenship at birth in the United States is primarily governed by federal law, not state law. The central constitutional rule comes from the Fourteenth Amendment, which links citizenship to birth “in the United States” and being “subject to the jurisdiction” of the United States.
Federal statutes also describe who is a citizen at birth
Congress has enacted statutes that list categories of people who are nationals and citizens of the United States at birth, including people “born in the United States, and subject to the jurisdiction thereof” under 8 U.S.C. § 1401.
The leading Supreme Court precedent still shapes the modern understanding
One of the most cited cases on birthright citizenship is United States v. Wong Kim Ark, 169 U.S. 649 (1898), where the Supreme Court held that a child born in the United States to parents of Chinese descent (who were not diplomats or officials) was a U.S. citizen at birth under the Fourteenth Amendment.
The phrase subject to the jurisdiction is where most disputes concentrate
Public debate often centers on what it means to be “subject to the jurisdiction” of the United States. The State Department’s published guidance on citizenship at birth in the United States discusses this concept and cites Wong Kim Ark, while describing narrow historical exceptions in 8 FAM 301.1.
Some U.S. births have special rules or well known exceptions
Agency guidance and case law describe a small set of situations that may fall outside the usual “born here equals citizen” idea. These exceptions are discussed in Wong Kim Ark and are summarized in State Department guidance, including examples involving diplomats and hostile occupation.
Children of accredited diplomats are treated differently under federal guidance
USCIS explains that children born in the United States to accredited foreign diplomatic officers generally do not acquire citizenship under the Fourteenth Amendment because they are not treated as “born . . . subject to the jurisdiction of the United States,” as discussed in the USCIS Policy Manual section on children born to accredited diplomats.
Birth in U.S. territories can depend on which territory it is
Federal statutes address citizenship for certain U.S. territories. For example, 8 U.S.C. § 1402 provides that people born in Puerto Rico and subject to U.S. jurisdiction are U.S. citizens at birth.
Nationality and citizenship are not always the same status in U.S. law
U.S. law uses “national” and “citizen” as related but not identical terms in some situations. Federal statute provides that certain people are “nationals, but not citizens” at birth under 8 U.S.C. § 1408, which is commonly discussed in connection with people born in American Samoa and Swains Island.
Citizenship by descent is a separate set of federal rules
Another category of birthright citizenship involves people born outside the United States who acquire U.S. citizenship at birth through a U.S. citizen parent under federal statutes. USCIS summarizes these rules in its Policy Manual chapter on U.S. citizens at birth and notes that the applicable rules can depend on the law in effect at the time of birth.
State birth records matter as evidence but they do not create citizenship
States and localities create and issue birth certificates, and those records often function as primary evidence in federal processes. Even so, a state-issued birth certificate is evidence of birth facts, while citizenship status is determined under federal constitutional and statutory law.
Proof of citizenship often involves federal documents and federal review
Many people document U.S. citizenship with a U.S. passport or with other federal records, depending on where and how citizenship was acquired. The State Department describes examples of acceptable evidence for passport purposes on its official page about citizenship evidence for a U.S. passport.
Certificates of citizenship are another federal form of documentation
USCIS issues Certificates of Citizenship in certain situations, and its publicly posted materials describe the purpose of the application used to request that certificate. One widely referenced document is the Form N-600 instructions, which explain that the certificate is evidence recognizing citizenship that was acquired or derived under federal law.
