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Dual citizenship

Luxembourg law provides for dual citizenship for nationals of third countries residing in Luxembourg or abroad. The Luxembourg law offers different paths to reclaim the Luxembourg nationality in case it was lost, or based on ancestry. Luxembourg has not signed any bilateral agreements with any other country on the specific matter of dual citizenship.

Applicants for dual Luxembourg citizenship should always verify with the competent authorities of their country of first citizenship whether the law of that country accepts the principle of dual or multiple citizenship. Luxembourg nationals seeking to acquire another country’s citizenship are invited to check with that country as well.

In particular, there is no bilateral agreement on dual citizenship between Luxembourg and the United States of America.

The website of the State Department gives the following information about US nationality and dual citizenship :

“Section 101(a)(22) of the Immigration and Nationality Act (INA) states that “the term ‘national of the United States’ means (A) a citizen of the United States, or (B) a person who, though not a citizen of the United States, owes permanent allegiance to the United States.” Therefore, U.S. citizens are also U.S. nationals. Non-citizen nationality status refers only individuals who were born either in American Samoa or on Swains Island to parents who are not citizens of the United States. The concept of dual nationality means that a person is a national of two countries at the same time. Each country has its own nationality laws based on its own policy. Persons may have dual nationality by automatic operation of different laws rather than by choice. For example, a child born in a foreign country to U.S. national parents may be both a U.S. national and a national of the country of birth. Or, an individual having one nationality at birth may naturalize at a later date in another country and become a dual national. 

U.S. law does not mention dual nationality or require a person to choose one nationality or another. A U.S. citizen may naturalize in a foreign state without any risk to his or her U.S. citizenship. However, persons who acquire a foreign nationality after age 18 by applying for it may relinquish their U.S. nationality if they wish to do so. In order to relinquish U.S. nationality by virtue of naturalization as a citizen of a foreign state, the law requires that the person must apply for the foreign nationality voluntarily and with the intention to relinquish U.S. nationality. Intent may be shown by the person’s statements and conduct.

Dual nationals owe allegiance to both the United States and the foreign country. They are required to obey the laws of both countries, and either country has the right to enforce its laws. It is important to note the problems attendant to dual nationality. Claims of other countries upon U.S. dual-nationals often place them in situations where their obligations to one country are in conflict with the laws of the other. In addition, their dual nationality may hamper efforts of the U.S. Government to provide consular protection to them when they are abroad, especially when they are in the country of their second nationality.  

U.S. nationals, including dual nationals, must use a U.S. passport to enter and leave the United States.Dual nationals may also be required by the foreign country to use its passport to enter and leave that country. Use of the foreign passport to travel to or from a country other than the United States is not inconsistent with U.S. law.”


Please also note that the US does not allow dual citizenship for members of the US military or for US government officials with a high level security clearance. 

For travel purposes, if you are a dual citizen and travel for less than 90 days, it is advised that you enter and exit the Schengen area with your US passport, in order to be able to present the entry and exit stamps to CBP upon re-entering the United States.


The Luxembourg law of March 8, 2017, as modified by the law of July 20, 2018, provides for the following cases :

- Luxembourg nationals are allowed to have dual citizenship if they acquire the nationality of a third country

- Luxembourg nationals that had lost their citizenship when they acquired the nationality of third country before the 2017 law may reclaim their Luxembourg citizenship on the basis of articles 14 or 31 of the March 8, 2017 law

- Descendants in direct paternal or maternal lineage of a Luxembourg ancestors who was alive on January 1, 1900 and had not lost his or her Luxembourg citizenship, could recover the Luxembourg nationality, under article 89 of the law. This possibility expired on December 31, 2018. However, candidates having completed the first stage of the process, i.e., lodged the application in certification of a Luxembourg ancestor alive on January 1, 1900 with the Ministry of Justice before the expiration of the December 2018 deadline, can complete the second stage of the process before December 31, 2020.  

- Descendants in direct (paternal) lineage of a Luxembourger born in the Grand Duchy of Luxembourg before April 19, 1941, can recover the Luxembourg nationality on the basis of article 7 of the March 8, 2017 law.  

- Adults over the age of 18 who have a Luxembourg parent or grand-parent are eligible for citizenship under article 23 of the 2017 law. 

Complete information about the citizenship procedure can be found under as well as on the website of the Ministry of Justice, where you can download all the forms necessary to start the process : .


For additional information and support, you may either contact the Infoline of the Ministry of Justice at +352.2478-8588, where a team of legal experts can assist you, or the Luxembourg American Cultural Society ( ).

Our Embassy does not process nationality applications, and we do not perform any kind of research, or translation.