Can you keep your Ireland citizenship when you become a U.S. citizen?
Allowed
Yes, in general
Irish citizens who become U.S. citizens keep their Irish citizenship.
What the law says
- Restrictions on holding multiple nationalities were repealed by the 1956 Act.
- Any Irish citizen who acquired another nationality no longer automatically lost their Irish citizenship.
- Individuals may instead voluntarily choose to renounce their Irish citizenship.
- Citizenship may be involuntarily removed from naturalised persons in specific cases such as fraud or breach of loyalty.
“any Irish citizen who acquired another nationality no longer automatically lost their Irish 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 Ireland lets you keep yours.
Source: Irish nationality law (Wikipedia, summarized on 2026-11-11). Laws change — confirm with the Ireland embassy or consulate before your oath ceremony. This is not legal advice.
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