Naturalization is the process to become a U.S. citizen if you were born outside of the United States. If you meet certain requirements, you may become a U.S. citizen either at birth or after birth.

File Online

Eligibility

To apply for naturalization to become a U.S. citizen, you must:

• Be at least 18 years of age at the time you file the application;

• Have been a lawful permanent resident for the past three or five years (depending on which naturalization category you are applying under);

• Have continuous residence and physical presence in the United States;

• Be able to read, write, and speak basic English;

• Demonstrate good moral character;

• Demonstrate knowledge and understanding of U.S. history and government;

• Demonstrate loyalty to the principles of the U.S. Constitution; and

• Be willing to take the Oath of Allegiance.

For detailed information and exceptions, including special provisions for those who have served in the U.S. military, please see Naturalization through Military Service.