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United States citizenship by descent is governed by INA §§301 & 309 · acquisition at birth. U.S. citizenship may pass at birth to a child born abroad to a U.S. citizen parent when the relationship and the parent's statutory U.S. physical-presence requirement are established. We assess the law in effect at birth, assemble the evidence, and coordinate passport, CRBA, or certificate-of-citizenship applications.
This pillar page clusters every piece of Ancestra content related to United Statesn citizenship by descent — country guide, document checklists, comparisons, glossary terms, cost estimates, and eligibility assessment — in one place.
The key thing to know: The applicable law is the law in effect when the child was born. Establishing each parent's citizenship, the parent-child relationship, and qualifying physical presence is essential.
Transmission rule: A child born abroad may acquire citizenship at birth through a U.S. citizen parent or parents under INA §§301 and 309; requirements vary by the parents' status, marital circumstances, and the law in force at birth.
Generational limit: No fixed generation limit, but each generation must independently have acquired citizenship and meet the transmission law in force at the child's birth.
Dual citizenship: Generally permitted — U.S. law does not require a citizen to choose between U.S. citizenship and another nationality.
Language requirement: None for citizenship acquired at birth.
Filing authority: U.S. Department of State (passport or Consular Report of Birth Abroad) or USCIS (Certificate of Citizenship).
FAQ
Is there a generational limit for United States citizenship by descent?
United States: No fixed generation limit, but each generation must independently have acquired citizenship and meet the transmission law in force at the child's birth.
Does United States allow dual citizenship?
United States: Generally permitted — U.S. law does not require a citizen to choose between U.S. citizenship and another nationality.
Related resources
United States country guide
INA §§301 & 309 · acquisition at birth
United States checklist (grandparent)
Complete document checklist for claiming through a grandparent
United States checklist (parent)
Complete document checklist for claiming through a parent
United States cost calculator
Estimate your all-in cost