How to Get Mexican Citizenship as an American: Birth Registration, Naturalization, Costs and Timing

Identify the Mexican nationality route that applies

Mexican nationality is acquired by birth or by naturalization under Article 30 of the Mexican Constitution. If you were born outside Mexico, Mexican nationality by birth may apply when your parent or parents meet the categories stated in Article 30.

Mexican consular guidance states that a person born abroad who is the child of a Mexican father or mother is entitled to register for Mexican nationality. The constitutional categories also include people born abroad to parents who are Mexican by birth or naturalization. Your parentage and birth records determine which evidence you need.

A Declaration of Mexican Nationality is listed at $1,590.00, with a maximum response time of one business day for that service, according to the Mexican Foreign Affairs Secretariat’s fee table. That service is separate from naturalization, which has its own eligibility conditions, documents, fee, and response period.

If you have no qualifying Mexican-parent connection, naturalization may be the relevant route. The Mexican Constitution identifies naturalization as including a foreign person who obtains a naturalization card from the Department of Foreign Affairs and identifies marriage to a Mexican citizen together with residence in Mexico and compliance with legal requirements as a naturalization category.

Confirm the evidence for Mexican nationality by birth

You must present a Mexican birth certificate for the parent or parents; if only one parent is Mexican, the Denver consular requirements accept proof such as that parent’s Mexican birth certificate or Mexican passport.

The San Diego instructions describe the birth certificate procedure as free and include the first certified copy; subsequent original copies cost US$20.00 each. Those amounts apply to the cited San Diego dual-nationality process, not to every consular service.

A Certificate of Mexican Nationality is listed at $2,475.00, with a maximum response time of one business day. The certificate is a separate nationality service from consular registration and from naturalization, so identify the document or procedure that matches your route before paying.

Complete the consular birth-registration process

The consular birth-registration process starts with a complete application and the documents proving your birth, identity, and Mexican parentage. Adults may complete the registration themselves, while a child must appear in person with both parents at the consulate.

Follow the order described by the applicable consulate:

2. Request an appointment through the consulate’s stated system. The January 2026 San Diego instructions required an appointment and said that dual-nationality appointments were available on Friday during the day.
3. Attend with the people required for the case. For the January 2026 San Diego procedure, the registered person and the parents, when applicable, had to attend.
4. Present the originals and copies required by that consulate so the registration can proceed through its document and registry stages.

The San Diego process requires the applicant’s U.S. birth certificate in original form and two letter-size photocopies. It also requires valid official identification for the registrant, in the original and two letter-size copies, with the full name matching the birth certificate.

The Denver consulate asks you to send scanned copies of the listed documents before the appointment. At the appointment, bring the originals and two copies of each document, including your original birth certificate and official identification. These Denver and San Diego instructions show why you should use the requirements of the consulate handling your registration rather than combine instructions from different locations.

For the January 2026 San Diego procedure, you could request an appointment through MiConsulado at citas.sre.gob.mx, by WhatsApp using the word “CITA,” or by telephone at (1-424) 309 00 09; confirmation was sent by email.

An applicant with a birth certificate issued outside the United States faces an additional document requirement. The January 2024 San Diego requirements state that the certificate must be apostilled or legalized by the issuing country and translated into Spanish when it is not in English; abstracts and short versions are not accepted. Those requirements belong to the San Diego procedure, so an applicant using another Mexican consulate should verify that location’s instructions before preparing the document. The birth-nationality instructions also require a marriage certificate when the mother uses her married name. The San Diego instructions require the original marriage certificate and two copies when the parents are or were married civilly.

Check whether naturalization by residence is available

Naturalization by residence requires you to prove at least five years of residence in Mexico immediately before applying with a temporary or permanent resident card. The Mexican Foreign Affairs Secretariat describes this route for foreign nationals who establish residence through the qualifying card issued by Mexico’s immigration authority.

Your resident card must show legal stay, include your CURP, and remain valid for at least six months after you submit the application. The residence requirement is measured immediately before the application date, so the card and your residence history must cover the required period rather than merely show that you once lived in Mexico.

A residence-based naturalization application requires the original and two legible photocopies of every page of your current foreign passport, including the outer covers, or of the applicable identity and travel document. The authority also requires a declaration under oath listing your entries and exits during the two years before you apply, using section “X. Apartado para manifestaciones de voluntad” of the current naturalization application.

The residence route therefore depends on more than a current immigration card. You need a qualifying five-year residence period, a card with the required remaining validity, complete passport records, and an accurate two-year travel declaration.

Submit the naturalization application and prepare for the examination

The Mexican naturalization application uses form DNN3 and requires the applicable documentation in duplicate. At your appointment, bring the original passport or resident card so the authority can compare it with the copies, and make sure the documentation complies with the Mexican Nationality Law and its Regulations.

Your foreign passport or travel identity document must have at least forty-five business days of validity. A federal criminal-record certificate must be valid for three months from its date of issuance. A temporary resident card used in the naturalization process must have at least six months of remaining validity.

The Mexican Foreign Affairs Secretariat identifies its study guide as the official study guide for the history and culture examination. Use that guide when preparing rather than relying on an unrelated summary.

The Mexican history and culture examination contains 10 questions, and you must answer at least 8 correctly to pass. The examination lasts no more than 10 minutes, so the requirement covers both the number of correct answers and the maximum time allowed.

After you complete the requirements and procedural stages, the Secretariat of Foreign Affairs may issue a delivery appointment if it considers issuing the naturalization letter appropriate under the applicable law and regulations. Completing an application and sitting for the examination therefore leads to a further authority decision rather than an automatic naturalization letter.

Separate official fees and response periods from the full timeline

The Mexican Foreign Affairs Secretariat lists a maximum response time of three months after the National Immigration Institute has issued its opinion; that period begins after the stated institutional step, not when you first start considering the application.

The 2026 fee table covers nationality and naturalization services provided by the Directorate General of Legal Affairs through December 31, 2026. Pay before submitting the application, because the authority says an application without a payment receipt cannot be attended to.

The official timing points measure separate stages of the naturalization process. After the Directorate General of Legal Affairs receives your original documents in Mexico City, a 20-business-day period begins for determining whether your application is procedurally admissible. Separately, the listed maximum response period is up to three months after the National Immigration Institute issues its opinion.

Examination problems can add further time. You may take the required examinations up to two times; for a second attempt, wait at least 15 business days before submitting the application and taking the examinations again. If you fail the second attempt, you must wait one year from the day after your last examination to submit a new application and pay the applicable fees again.

The 20-business-day period and three-month response period are separate official stages, not a typical total duration for naturalization. The periods described above do not establish a typical end-to-end timeline for birth registration or naturalization. Before filing, ask the Mexican consulate or SRE office handling your route to confirm current appointment availability and route-specific timing. If the route or timing is uncertain, contact a qualified professional or the responsible authority promptly.

Understand Mexican and U.S. citizenship travel rules

Separately, U.S. State Department guidance says you may relinquish U.S. nationality only through a potentially expatriating act performed voluntarily and with the intention of relinquishing U.S. citizenship. U.S. nationals, including U.S. dual nationals, must use a U.S. passport to enter and leave the United States. Mexico may require you to use a Mexican passport to enter and leave Mexico if you hold both Mexican and U.S. nationality.

If naturalization is your route, the history and culture examination still has a maximum duration of 10 minutes, separate from the passport rules that apply after you hold both nationalities. Keep travel planning and examination preparation as distinct parts of the process.

Resolve document, eligibility, or status problems before filing

Document discrepancies should be resolved before you submit a nationality or naturalization application.

Check the points that can stop the cited process from moving forward:

1. Confirm that your name and your parents’ names match the relevant birth certificates and official identification. The Denver requirements call for exact matching of the parents’ names.
2. Confirm that your parentage evidence fits nationality by birth, or that your residence and immigration records fit naturalization by residence.
3. Check that your passport has at least 45 business days of validity, your federal criminal-record certificate is valid for three months, and your temporary resident card has at least six months remaining when those documents apply.
4. Make the required payment before submitting a naturalization application and keep the payment receipt with the filing documents.

Age-specific identification rules can also affect a birth registration. For an applicant between 7 and 18 years of age, the January 2026 San Diego instructions listed a valid U.S. passport, valid California ID, current photo school ID with transcript, or a qualifying enrollment certificate.

If your documents, Mexican parentage, residence history, identity, or examination status is uncertain, pause before filing or paying and obtain qualified nationality or immigration help for that specific issue.

Start with the correct Mexican authority

Start by identifying whether Mexican nationality by birth or naturalization fits the facts you can document. Then use the current requirements of the appropriate Mexican consulate or the Secretariat of Foreign Affairs, prepare the matching documents, and separate the stated fees and processing periods from the total time you may need.

Resolve mismatched records and uncertain eligibility before you submit the application.

The content in this article is simplified for general informational purposes and does not apply to all situations. Readers should not make or refrain from making any decisions based on this information without first consulting a qualified professional. To look at your own situation, send us your details at the bottom of this page or start with our Global Strategy Service.

Frequently asked questions

If only one of my parents is Mexican, can I register for Mexican nationality by birth?

You may be able to register by birth if you can prove that parent’s Mexican nationality.

What is the difference between the listed naturalization fee and the total cost of becoming Mexican?

The Mexican Foreign Affairs Secretariat lists the naturalization fee at $9,500.00 for any modality in its 2026 fee table, which applies through December 31, 2026. That is the official naturalization charge; document, travel, translation, appointment, and other personal costs are separate and are not established by the cited fee table.

Can I use my U.S. passport after obtaining Mexican nationality?

You must use a U.S. passport to enter and leave the United States. Mexico may require a Mexican-U.S. dual national to use a Mexican passport to enter and leave Mexico, so confirm the current Mexican travel rules before traveling.