Can you keep your Mexico citizenship when you become a U.S. citizen?
Allowed with conditions
Only in some cases
Mexicans by birth keep their nationality when they become U.S. citizens, but naturalized Mexicans may lose it.
What the law says
- Article 37 establishes that no authority can deprive Mexicans by birth of their nationality upon acquiring another nationality.
- Naturalized Mexicans may lose their nationality by voluntarily acquiring another nationality.
- Naturalized Mexicans may also lose nationality by presenting themselves as foreigners or accepting nobility titles implying submission to a foreign state.
- Mexican nationals by birth can never involuntarily lose their nationality, though citizenship prerogatives may be lost under certain conditions.
“no authority can deprive Mexicans by birth (natural born Mexicans) of their 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 Mexico lets you keep yours.
Source: Mexican nationality law (Wikipedia, summarized on 2026-11-11). Laws change — confirm with the Mexico embassy or consulate before your oath ceremony. This is not legal advice.
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