Yes — dual citizens can legally hold two passports, and the U.S. has no limit on citizenships. The one hard rule: you must use your U.S. passport to enter and leave the United States. Everywhere else, you can use whichever passport is more advantageous — visa-free access, shorter queues, or lower fees.
The golden rule of dual passports
U.S. law requires citizens to enter and depart the U.S. on a U.S. passport — full stop. Show your other passport to the airline for the destination's requirements, but CBP wants the American one. The reverse applies abroad: use your second passport to enter countries where it gives better treatment.
How the airport dance works
- Airline check-in: show the passport your destination requires (e.g., EU passport flying to Paris)
- U.S. exit: no exit immigration — but the airline shares your U.S. passport data with CBP via APIS
- Destination immigration: enter on whichever passport you're using there
- Return check-in: show BOTH — destination passport proves you were legal there, U.S. passport proves you can board to America
Where the second passport saves you
- EU passport → Schengen residency rights + EU-lane immigration
- Countries that charge Americans reciprocity fees (Brazil visa fees drop on many second passports)
- Nations hostile to U.S. passports — enter on your other nationality where legal
- Consular backup — two embassies to call in a crisis
Edge cases that bite
- Countries that don't recognize dual nationality may treat you solely as their citizen inside their borders — including mandatory military service (several countries enforce this on dual nationals)
- Booking name must match the passport you'll show — keep tickets consistent
- Children with two citizenships: same rules, both passports can be issued
- Some countries require their citizens to enter on their national passport too (most of the EU does)
Traveling with Two Passports: Dual Citizenship Rules (2026) — FAQ
Can I have two U.S. passports at once?
Which passport do I use at U.S. customs?
Do I have to tell the airline about both passports?
Can dual citizens be drafted by their other country?
Related guides
Entry rules change without notice. Always verify with official government sources (travel.state.gov, embassy websites) before booking. Last reviewed October 2026. This page may contain partner links — see our affiliate disclosure.