Can you keep your Tanzania citizenship when you become a U.S. citizen?
Not allowed
No, in general
Tanzanian citizens who voluntarily acquire U.S. citizenship lose their Tanzanian citizenship, as Tanzania does not permit dual nationality.
What the law says
- Tanzania does not allow its nationals to hold dual nationality, except for persons under eighteen who had multiple nationality from birth.
- Multiple nationals automatically lose their Tanzanian citizenship at majority unless they renounce all other nationality.
- Nationals by birth or naturalisation may be denaturalized in Tanzania for obtaining other nationality.
- Tanzanian nationals can voluntarily renounce citizenship by registering a request, providing proof of other nationality, surrendering their Tanzanian passport, and obtaining approval from the Minister of Home Affairs.
“Tanzania does not allow its nationals to hold dual nationality”
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 Tanzania lets you keep yours.
Source: Tanzanian nationality law (Wikipedia, summarized on 2026-11-11). Laws change — confirm with the Tanzania embassy or consulate before your oath ceremony. This is not legal advice.
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