Can you keep your Australia citizenship when you become a U.S. citizen?
Allowed
Yes, in general
Australians who become U.S. citizens keep their Australian citizenship, since multiple citizenship has been permitted since 4 April 2002.
What the law says
- Until 4 April 2002, Australians who became citizens of another country automatically lost Australian citizenship.
- Multiple citizenship has been permitted since this restriction was repealed.
- The old automatic-loss rule did not apply to those who acquired a foreign citizenship by marriage.
- Naturalisation candidates were not required to relinquish their former nationalities.
“multiple citizenship has been permitted since this restriction was repealed”
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 Australia lets you keep yours.
Source: Australian nationality law (Wikipedia, summarized on 2026-11-11). Laws change — confirm with the Australia embassy or consulate before your oath ceremony. This is not legal advice.
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