Dual Citizenship: What the United States Actually Requires

The United States does not require you to give up another nationality in order to become a U.S. citizen. The oath of allegiance contains language about renouncing allegiance to foreign states, and that wording alarms people every year, but U.S. law does not treat taking the oath as terminating another country's citizenship, and it does not ask for proof that you have surrendered a foreign passport. Dual nationality is tolerated. The real question is almost never what the United States requires — it is what your other country of nationality does when it learns you naturalized.

The oath and what it actually operates on

The renunciatory phrase in the oath is a statement of allegiance, and it has practical meaning: a new citizen accepts obligations to the United States and its Constitution. What it does not do is act on another country's law. Only that country can decide whether its own citizenship continues, and many countries take no action at all.

USCIS administers naturalization and publishes the standards it applies in the USCIS Policy Manual. Nothing in the application process requires an applicant to hand over a foreign passport or to obtain a release from a former government. Where a person's ability to understand or communicate the oath is affected by a medical condition, a separate process applies — see disability accommodations at a naturalization interview.

Worth knowing: The State Department's general position, reflected in its published legal information, is that U.S. law recognizes the existence of dual nationality but does not encourage it as a policy matter, largely because a dual national owes obligations to both countries and consular protection abroad can be limited in the country of the other nationality.

How U.S. citizenship is actually lost

The statute at 8 U.S.C. 1481 lists the acts that can result in loss of nationality — naturalizing in a foreign state, taking an oath to a foreign state, serving in certain foreign armed forces, holding certain foreign government positions, and formally renouncing before a U.S. official abroad, among others. The crucial words in the statute are that the act must be performed voluntarily and with the intention of relinquishing U.S. nationality.

That intention requirement is what makes ordinary dual nationality workable in practice. Acquiring a second citizenship, by itself, is not treated as evidence that you meant to give up the American one. The administrative presumption applied for decades has been that a citizen performing most of these acts intends to keep U.S. nationality unless they say otherwise.

Careful: Renunciation is not a tax strategy and is not reversible on request. It carries continuing obligations and can affect the ability to visit family. Anyone considering it should get advice specific to their situation, including tax advice, well before making an appointment at a consulate.

The other country's law is the variable

This is where the outcomes diverge. Some countries permit dual citizenship without restriction. Some end citizenship automatically when a citizen voluntarily naturalizes elsewhere. Some require a formal application to retain it, made before the foreign naturalization. Some distinguish between citizens who naturalize abroad and citizens who acquire another nationality at birth.

• Check your other country's rules with its own embassy or ministry, not with U.S. sources.
• Find out whether any retention application must be filed before you naturalize.
• Ask about military service obligations, which some countries enforce against dual nationals who visit.
• Ask about property or inheritance rules that may be limited to citizens.
• Confirm which passport that country expects you to use to enter it.

Because the sequencing sometimes cannot be undone, people with a nationality they want to keep frequently talk to a citizenship attorney and to their other country's consulate in the same week, before filing anything. Missing a retention deadline in the other country is a mistake U.S. law cannot fix.

Living as a dual national

Nationality itself is federal, but several things people associate with citizenship are not. Eligibility for elected and appointed office, jury service, certain professional licenses, and some public employment is governed by state law and sometimes by city or county charter, and a few of those rules touch dual nationals specifically. If any of this affects your plans, check the rules for your own state and municipality rather than assuming the federal position settles it.

Document care matters more for dual nationals than for anyone else, because a lost certificate in one country cannot be replaced from the other. Our guide on replacing a lost citizenship or naturalization certificate covers the U.S. side, and emergency travel documents and boarding foils covers what happens when documents disappear mid-trip. General travel-related legal information from the State Department is at travel.state.gov, with broader material at state.gov.

Common questions

Will USCIS ask me to surrender my old passport at the interview?

No. You bring your passports so the officer can review travel history, and they are returned to you. There is no step in the naturalization process that collects a foreign passport or requires proof that you gave one up. If someone tells you otherwise — a preparer, an employer, a relative — they are describing a rule that does not exist under U.S. law.

Can my U.S. citizenship be taken away after I naturalize?

Naturalization can be revoked in narrow circumstances, principally where it was obtained by concealment or willful misrepresentation of a material fact, or where required conditions were not actually met. That is a judicial or administrative process with its own protections, not something that happens because you kept another passport. Holding dual nationality is not a basis for revocation.

Does my child automatically hold both nationalities?

It depends on both countries' rules, and neither is automatic in every case. U.S. citizenship can pass to a child born abroad where the statutory conditions on the parent's prior physical presence are met, and it should be documented promptly through a consular report of birth. The other country's transmission rules are separate, and some require registration within a set period after birth.

Do I have to tell the United States that I acquired another citizenship?

There is no general reporting requirement to USCIS for acquiring another nationality after you are already a citizen. Certain government positions, security clearances, and tax forms ask about foreign citizenship or foreign accounts, and those obligations are real and separate. Answer them accurately, and keep documentation of when and how the other citizenship was acquired.

What to do next