A foreign national is a person or organization who is not a citizen of the United States, and who is a citizen of a foreign country. The Immigration and Nationality Act (INA) uses the term "alien" to refer to a person who is not a United States citizen, and does not use the term "foreign national."
See also: 8 U.S.C. § 1101(a)(21)
[Last updated in December of 2022 by the Wex Definitions Team]