Dual nationality in Mexico (2026)

Last reviewed: 9 October 2026

In short: Naturalisation in Mexico requires the applicant to renounce their previous nationality. Mexicans by birth cannot be deprived of their nationality, but naturalised Mexicans lose it by voluntarily acquiring a foreign nationality.

RuleWhat applies
Naturalisation: giving up the previous nationalityNationality rulesRequired [1]
Naturalisation: exceptions to giving up the previous nationalityNationality rulesArticle 19 sets no exception: a foreigner who wishes to naturalise must expressly renounce the nationality attributed to them and all submission, obedience and fidelity to any foreign state (Article 17). The Secretaría can require this only after it has decided to grant nationality, and the naturalisation letter is issued once the renunciations are verified. [1]
Voluntarily acquiring a foreign nationalityNationality rulesLoss, with exceptions [2]
Loss of nationality on acquiring a foreign nationality: detailsNationality rulesNo Mexican by birth can be deprived of their nationality (Article 37(A)). Mexican nationality by naturalisation is lost by voluntarily acquiring a foreign nationality, by passing oneself off as a foreigner in a public instrument, by using a foreign passport, by accepting or using noble titles that imply submission to a foreign state, or by residing abroad for five continuous years (Article 37(B)); loss is declared after a hearing (Ley de Nacionalidad, Art. 27). [2]

Notes

  • The loss rule applies to Mexicans by naturalisation only. Mexicans by birth cannot be deprived of their nationality. The Constitution text read is the consolidated version with the last reform of 15 November 2024.

Sources

  1. Orden Jurídico Nacional (Secretaría de Gobernación): Ley de Nacionalidad (texto vigente, última reforma DOF 23-04-2012) (consulted 9 October 2026) · all sources
  2. Orden Jurídico Nacional (Secretaría de Gobernación): Constitución Política de los Estados Unidos Mexicanos (texto vigente, última reforma DOF 15-11-2024) (consulted 9 October 2026) · all sources

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General information, not legal advice. Rules change: check the official source before you fly or ride.