Can you keep your Singapore citizenship when you become a U.S. citizen?
Not allowed
No, in general
Singapore citizens who acquire U.S. citizenship lose their Singapore citizenship.
What the law says
- Holding another nationality while being a Singapore citizen over the age of 21 is disallowed.
- A Singapore citizen will lose their citizenship if they acquire another nationality.
- Singapore citizenship is automatically lost when an individual voluntarily acquires a foreign citizenship in any way.
- Singaporean children with multiple nationalities must choose between their Singaporean and foreign statuses before age 22.
- Former citizens cannot reacquire citizenship once it has been renounced or revoked.
“a Singapore citizen will lose their citizenship if they acquire another 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 Singapore lets you keep yours.
Source: Singaporean nationality law (Wikipedia, summarized on 2026-11-11). Laws change — confirm with the Singapore embassy or consulate before your oath ceremony. This is not legal advice.
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