Can I Have Dual Citizenship? The U.S. Rules
Yes, you can usually have dual citizenship as a U.S. citizen, because the United States generally permits it, but whether you keep your other nationality depends on that country’s laws. Dual citizenship means holding citizenship in the U.S. and another country at the same time. The U.S. does not require you to give up another nationality when you naturalize, though the Oath of Allegiance involves renouncing allegiance to other countries, and some other nations do not allow dual citizenship.
This guide explains the U.S. position, the other country’s role, and practical considerations. It connects to our guides on how to become a U.S. citizen y green card versus citizenship.
Wondering whether you can keep your original nationality after naturalizing? Atlas Legal can help you understand the U.S. side. Contact our team to get started.
Principales conclusiones
- The U.S. generally permits dual citizenship.
- Naturalizing does not, from the U.S. side, require giving up another nationality.
- Whether you keep your other citizenship depends on that country’s laws.
- Some countries do not allow dual citizenship and may end yours.
- Dual citizens have obligations to both countries, such as taxes and laws.
What This Guide Covers
- The U.S. position
- The oath and renunciation
- The other country’s role
- Obligations of dual citizens
- How to check your situation
- Frequently asked questions
The U.S. Position
The United States generally allows dual citizenship. It does not require a person who naturalizes to formally give up citizenship in another country as a condition of becoming a U.S. citizen from the U.S. side.
This means many people become U.S. citizens while remaining citizens of their country of origin. The U.S. recognizes that dual citizenship exists and does not, in general, force you to choose.
The Oath and Renunciation
When you naturalize, you take the Oath of Allegiance, which includes renouncing allegiance to other countries. This can sound like giving up your other citizenship, but in practice the U.S. does not require you to take formal steps with the other country to abandon that nationality.
The oath is about your allegiance to the United States. Whether your other citizenship actually ends is determined by the other country’s laws, not by the U.S. oath alone.
The Other Country’s Role
The decisive factor for keeping your original nationality is that country’s law. Some countries freely allow dual citizenship, while others do not and may consider you to have given up their nationality when you naturalize elsewhere.
| Scenario | Result for your other citizenship |
|---|---|
| Other country allows dual citizenship | You generally keep both |
| Other country prohibits it | You may lose the other nationality |
| Other country requires a formal step | You may need to notify or apply to keep it |
Because rules vary widely, check with the other country’s authorities to understand how naturalizing in the U.S. affects your status there.
Obligations of Dual Citizens
Holding two citizenships comes with duties to both countries. As a U.S. citizen, you must follow U.S. laws and tax rules, including reporting worldwide income, regardless of where you live.
The other country may also impose obligations, such as taxes, military service, or laws that apply when you are there. Understanding both sets of responsibilities helps you avoid surprises, especially around taxes and travel on each passport.
Have questions about how naturalizing affects your original citizenship? A review can clarify the U.S. side. Ask Atlas Legal to help.
How to Check Your Situation
Because the outcome depends on the other country, the most reliable step is to confirm its rules through its embassy, consulate, or official resources. Ask specifically whether it allows dual citizenship and whether any step is needed to keep your nationality after you naturalize in the U.S.
On the U.S. side, an immigration attorney can explain what naturalization involves and confirm that the U.S. generally permits dual citizenship, so you can plan with a clear picture of both.
When to Work With an Immigration Attorney
The U.S. side of dual citizenship is generally straightforward, but coordinating with the other country and understanding obligations can be complex. Legal help is valuable when you want to confirm how naturalizing affects your plans, when tax or travel implications concern you, or when you have questions about the oath and its effect. An attorney can explain the U.S. process, while the other country’s authorities govern that nationality. Outcomes depend on the facts of each case.
Preguntas frecuentes
Can I have dual citizenship?
Usually yes as a U.S. citizen, because the United States generally permits dual citizenship and does not require you to give up another nationality when you naturalize. However, whether you keep your other citizenship depends on that country’s laws. Some countries allow dual citizenship, while others do not and may consider you to have given it up. Check the other country’s rules to be sure.
Does the U.S. allow dual citizenship?
Yes, generally. The U.S. recognizes that dual citizenship exists and does not, as a rule, require a person who naturalizes to formally renounce citizenship in another country from the U.S. side. Many people become U.S. citizens while remaining citizens of their country of origin. The U.S. does not force you to choose, though the other country’s law determines whether you keep that nationality.
Do I have to give up my original citizenship to naturalize?
From the U.S. side, generally no. The U.S. does not require you to take formal steps with your other country to abandon that nationality as a condition of naturalizing. The Oath of Allegiance includes renouncing allegiance to other countries, but in practice the U.S. does not require you to give up the other citizenship. Whether it ends depends on the other country’s laws.
What does the Oath of Allegiance mean for dual citizenship?
The oath includes renouncing allegiance to other countries and pledging allegiance to the United States. While the wording sounds like giving up other citizenship, the U.S. does not require you to formally abandon another nationality with that country. The oath establishes your allegiance to the U.S. Whether your other citizenship actually ends is decided by the other country’s law, not by the oath alone.
Will my home country let me keep citizenship if I naturalize in the U.S.?
It depends entirely on that country. Some countries freely allow dual citizenship, so you keep both. Others prohibit it and may treat your U.S. naturalization as giving up their nationality, and some require a formal step to retain it. Because rules vary widely, confirm with the other country’s embassy, consulate, or official resources how naturalizing in the U.S. affects your status there.
Do dual citizens pay taxes to both countries?
As a U.S. citizen, you must follow U.S. tax rules, including reporting worldwide income, regardless of where you live. The other country may also impose taxes or other obligations. Whether you owe tax to both depends on each country’s laws and any tax treaties. Because dual taxation issues can be complex, many dual citizens seek tax advice to understand and meet their obligations in both countries.
Which passport do I use when traveling?
U.S. citizens are generally expected to enter and leave the United States using their U.S. passport. When traveling to your other country of citizenship, you may need to use that country’s passport under its rules. Carrying both and using each appropriately is common for dual citizens. Check each country’s requirements, since using the wrong passport at a border can cause complications.
Can I lose my U.S. citizenship by keeping another nationality?
Generally no. Holding another nationality does not, by itself, cause you to lose U.S. citizenship. U.S. citizenship is very secure and is lost only in rare circumstances, such as fraud in obtaining it or a voluntary, intentional act to relinquish it. Simply being a dual citizen and maintaining your other nationality does not put your U.S. citizenship at risk.
Bottom Line
You can usually have dual citizenship as a U.S. citizen, since the U.S. generally permits it and does not require giving up another nationality when you naturalize. The deciding factor is the other country’s law, which may allow, prohibit, or condition dual citizenship. Dual citizens have obligations to both countries, including U.S. taxes. Each case depends on its own facts.
If you have questions about naturalizing and dual citizenship, Atlas Legal Immigration Law can help with the U.S. side. Reach us at 1750 E Golf Rd Ste 214, Schaumburg, IL 60173, call (+1) 872 382 2762, or email info@theatlaslegal.com. Learn more on our services page.
Reviewed by the Atlas Legal Immigration Law editorial team. Last reviewed on July 24, 2026.
Sources
- U.S. Department of State, Dual Nationality
- U.S. Citizenship and Immigration Services, Citizenship and Naturalization
- U.S. Citizenship and Immigration Services, Policy Manual: Oath of Allegiance
This article is provided for general informational purposes only and does not constitute legal advice. Immigration laws, government fees, policies, and processing times may change. Reading this article or contacting Atlas Legal does not by itself create an attorney-client relationship. The outcome of any immigration matter depends on its individual facts and circumstances.
