14th Amendment - Section 1
All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the
State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.
Citizenship conferred on a child at birth is called "jus soli" - Latin for "right of the soil". The term is fairly synonymous with "birthright citizenship". It is distinguished from "jus sanguinis" which confers citizenship based on parental status.
Most countries in the Americas confer citizenship via "jus soli". Most European countries continue to adhere to "jus sanguinis" although there are varations.
**Countries in dark blue on this map adhere to jus soli.