A Citizenship Conditions
Applicants born in other countries are U.S. Citizens when they meet one of the following conditions:
 
Naturalized citizens who have been granted citizenship by the U.S. Department of Justice.
A child can attain U.S. citizenship when both parents (or the sole custodial parent) become naturalized U.S. citizens. The parent's must become naturalized before one of the following:
The child's 21st birthday when the parents were naturalized before October 14, 1940.
The child's 18th birthday when the parents were naturalized on or after October 14, 1940.
Born outside the U.S. or the previously listed possessions and territories, and their parents meet one of the following criteria:
Both parents are U.S. citizens and at least one parent lived in the U.S. or its territories before the applicant's birth.
One parent is a U.S. citizen and the other is a noncitizen. The parent who is a citizen must have lived in the U.S., its possessions, or its territories for a total of five years before the applicant's birth. At least two of the five years must be after the parent reached age 14.
 
NOTE Consider the parent to have had U.S. residence for any period of time that they live outside of the U.S. as one of the following:
A U.S. Government employee
Serving in the U.S. Armed Forces
 
A woman who married a U.S. citizen before September 22, 1922. This does not apply to a man who married a U.S. citizen.
Dual Citizens
Applicants may be recognized by a foreign country as a citizen of that country and by the U.S. as a U.S. citizen. Applicants claiming dual citizenship must verify U.S. citizenship.