Can you keep your Vietnam citizenship when you become a U.S. citizen?
Allowed
Yes, in general
Vietnamese citizens who become U.S. citizens keep their Vietnamese citizenship, since acquiring a foreign nationality does not automatically strip it.
What the law says
- Vietnam does not prohibit dual or multiple citizenships.
- Acquiring a foreign nationality does not automatically strip one of Vietnamese citizenship.
- Vietnam officially recognizes only one nationality.
- Vietnamese nationality is primarily conferred by descent (jus sanguinis).
“acquiring a foreign nationality does not automatically strip one of Vietnamese citizenship”
What about the U.S. side?
The United States allows dual citizenship. At the oath ceremony you promise to renounce allegiance to other countries, but U.S. law does not make you formally give up your other passport. The question is only whether Vietnam lets you keep yours.
Source: Vietnamese nationality law (Wikipedia, summarized on 2026-11-11). Laws change — confirm with the Vietnam embassy or consulate before your oath ceremony. This is not legal advice.
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