U.S. citizenship | USAGov

Learn about naturalization, dual citizenship, and proving or renouncing your citizenship.

Become a U.S. citizen through naturalization

Naturalization is the process of voluntarily becoming a United States citizen. Learn about the steps that lead to U.S. citizenship, including the naturalization test.
Proving U.S. citizenship

Learn how to get a Certificate of Citizenship or Naturalization. Or prove your U.S. citizenship without a birth certificate if you were born outside the U.S. to a U.S. citizen.
How to get dual citizenship or nationality

Having dual citizenship, also known as dual nationality, means being a citizen of the United States and another country at the same time.
Renounce or lose your citizenship

Renouncing and losing your citizenship both result in no longer being a U.S. citizen. Learn how to voluntarily renounce your citizenship or how you might involuntarily lose it.