A person born in California is automatically a U.S. citizen at birth. This is because California is part of the United States, and under the Fourteenth Amendment to the U.S. Constitution, all persons born in the United States and subject to its jurisdiction are citizens. This birthright citizenship applies regardless of the parents' immigration status or nationality. California, in particular, affirms this citizenship even amidst legal challenges to birthright citizenship. Thus, birth in California confers automatic U.S. citizenship.
