Becoming a U.S. Citizen
If you are a foreign national who is a permanent resident, you may become a United States citizenship through the naturalization process. The process of becoming a United States citizen can be longer or shorter depending on your basis for your green card, criminal history, and evidence of good moral character.
There are often instances of persons born abroad who automatically acquire U.S. citizenship despite being outside of the U.S. If you were born abroad and have one parent who is a U.S citizen you may have acquired citizenship