Portuguese Dual Citizenship in the U.S. — 2026 Guide

Portugal is generous with descent and the consulates handle several routes: children of Portuguese parents, grandchildren of Portuguese grandparents, nationality by marriage, and the route created for descendants of Sephardic Jews. Dual nationality is permitted throughout.

Quick facts

Unlike Ireland, Portugal does not cut the line off after one registered generation: once granted, nationality can be transmitted onwards. That is why Portuguese descent files often cover three or four generations at once.

The routes

The documentary standard is exacting and specific: original certificates bearing the raised seal, apostilled where issued outside the United States, and a justifying document wherever a name on a passport differs from the name on a certificate.

How to apply

1. Establish which route fits, because they are filed in different places.
2. Order original certificates with raised seals for everyone in the chain.
3. Apostille any certificate issued outside the United States.
4. Gather marriage certificates or name-change documents explaining every discrepancy.
5. Complete the nationality application form, which is obligatory.
6. Follow with the citizen card and then the passport once nationality is granted.

Required documents

• Applicant’s original birth certificate with raised seal.
• Foreign parent’s original birth certificate where applicable.
• Copy of a valid foreign passport.
• Copy of the parents’ citizen cards, or passports where one is foreign.
• Documents justifying any difference between names.
• Completed nationality application form.

Where to apply

At the consulate for children of Portuguese parents and for marriage cases; through the central registry in Portugal for grandchildren.

Additional notes

The grandchildren route is filed elsewhere

Consulates explain it but point applicants to the central registry service, which is a different process with its own evidence requirements about ties to Portugal.

The Sephardic route has changed

It appears on consular menus but the conditions have been tightened more than once, and its future has been debated. Confirm the current rules before starting or paying anyone.

Names must reconcile

Portuguese naming customs, with multiple surnames, rarely survive American records intact. Expect to document every variation.

It is worth an EU passport

Portuguese nationality carries the right to live and work across the European Union, which is why these files justify the effort.