Dual citizenship
Which countries allow dual citizenship with the US
Filter the table by answer, or type a country: each row says whether you keep US citizenship and how descent works there.
44 countries shown
| Country | Keep US citizenship | By descent |
|---|---|---|
| Argentina | YesAn Argentine who naturalizes in a country without a dual-nationality agreement is treated as Argentine for all purposes; the agreement with the US applied only until October 20, 1981. source | Not covered by the source quoted |
| Armenia | YesObtaining another citizenship does not automatically end Armenian citizenship, which is granted or renounced only by presidential decree. source | Adults who are ethnic Armenians by descent can acquire citizenship without residence, proving ancestry with a baptism certificate, a foreign document recording Armenian descent, or a parent's, grandparent's or sibling's ID showing Armenian ancestry, plus kinship records. |
| Australia | YesAustralians have been able to take another citizenship without losing Australian citizenship since April 4, 2002; adults who did so before that date may have lost it under old s. 17. source | Not covered by the source quoted |
| Austria | With conditionsNo renunciation for s. 58c, but acquiring another citizenship after filing costs Austrian citizenship retroactively; outside s. 58c Austria generally forbids dual citizenship. source | Parent only at birth; no limit for descendants of persecuted people (s. 58c) |
| Belgium | YesSince April 28, 2008 a Belgian who voluntarily acquires US citizenship keeps Belgian nationality; before June 9, 2007 it was lost. source | Belgians born abroad after January 1, 1967 who did not mainly live in Belgium between 18 and 28 lose Belgian nationality on their 28th birthday unless they file a declaration to keep it. |
| Brazil | YesSince Constitutional Amendment 131/2023 a Brazilian loses nationality only on express request (or cancelled naturalization), so taking US citizenship no longer costs Brazilian nationality. source | A child born abroad to a Brazilian father or mother is a native Brazilian if registered at a competent Brazilian office, or if they come to live in Brazil and opt for Brazilian nationality (art. 12, I, c). |
| Canada | YesCanada allows multiple citizenship; you need a Canadian passport to fly back to Canada. source | No limit for people born before December 15, 2025; after that, 1,095 days of the parent's presence in Canada |
| China | NoChina does not recognize dual nationality; a Chinese national settled abroad who naturalizes in the US loses Chinese nationality automatically. source | A child born abroad to a Chinese parent is Chinese, except when a Chinese parent has settled abroad and the child acquired a foreign nationality at birth (art. 5), which covers most US-born children. |
| Colombia | YesColombian nationality is not lost by acquiring US or any other nationality (Constitution art. 96). source | Not covered by the source quoted |
| Croatia | YesAcquiring US citizenship does not end Croatian citizenship, which ends only by release, renunciation or treaty; Croatian authorities treat a dual national solely as Croatian. source | Not covered by the source quoted |
| Czech Republic | YesSince January 1, 2014 Czech citizens keep their citizenship when they take another. source | Children and grandchildren of a former citizen (declaration) |
| Denmark | YesSince September 1, 2015 a Dane who takes US citizenship keeps Danish citizenship. source | Not covered by the source quoted |
| Dominican Republic | YesDominicans may acquire a foreign nationality, and acquiring it does not mean losing Dominican nationality (Constitution art. 20). source | Children born abroad to a Dominican mother or father are Dominican even if they hold another nationality by birthplace; at 18 they may declare that they assume dual nationality or renounce one (art. 18.4). |
| El Salvador | YesSalvadorans by birth have the right to dual or multiple nationality and lose it only by express renunciation (Constitution art. 91). source | Children of a Salvadoran father or mother born abroad are Salvadorans by birth (art. 90, 2º). |
| Finland | YesFinland has allowed multiple citizenship since the Nationality Act 359/2003 came into force on June 1, 2003; the Act has no rule ending Finnish citizenship on naturalization abroad. source | A child of a Finnish mother is Finnish at birth, and of a Finnish father if married to the mother (as enacted in 2003); a Finn who also holds another citizenship keeps Finnish citizenship at 22 only with sufficient ties to Finland (s. 34). |
| France | YesNo renunciation of US citizenship; French nationals who take another nationality keep French nationality unless they declare otherwise. source | No limit in law, but blocked after 50 years abroad without French papers (art. 30-3) |
| Germany | YesAccepted generally since June 27, 2024; losses before that date stay. source | No limit, if every link was still German when the next child was born |
| Greece | YesTaking another citizenship does not end Greek citizenship without the Interior Minister's permission. source | No limit, generation by generation, each one registered in Greece |
| Hungary | YesHungary does not ask you to give up US citizenship. source | No limit for simplified naturalization, with a conversation in Hungarian |
| India | NoIndian citizenship ends automatically when an Indian acquires US citizenship (Citizenship Act s. 9); the Indian passport must be surrendered. OCI is a visa status, not dual citizenship. source | Not covered by the source quoted |
| Ireland | YesIreland allows dual citizenship. source | Parent born in Ireland (automatic) or grandparent born in Ireland (register) |
| Italy | YesNo renunciation of US citizenship (art. 11 of Law 91/1992). source | Parent or grandparent only, since March 28, 2025 |
| Jamaica | YesJamaicans do not lose Jamaican citizenship by becoming citizens of another country, as stated by the government information service; renunciation is a formal, voluntary declaration. source | Not covered by the source quoted |
| Japan | NoA Japanese national who acquires US citizenship by choice, for example by naturalization, loses Japanese nationality automatically; people dual from birth must choose by 20 if dual before 18. source | A child of a Japanese parent is Japanese at birth, but a child born abroad who also gets a foreign nationality at birth loses Japanese nationality unless a parent files a reservation of Japanese nationality with the birth notification within 3 months. |
| Latvia | YesExiles and their descendants keep any citizenship; others may keep the US one, as a NATO country. source | Any generation, from a citizen on June 17, 1940 |
| Lithuania | With conditionsUS citizenship can be kept only if the ancestor was exiled or left Lithuania before March 11, 1990; otherwise it must be renounced. source | Children, grandchildren and great-grandchildren of a citizen before June 15, 1940 |
| Mexico | YesA Mexican by birth cannot lose Mexican nationality; you enter and leave Mexico as a Mexican. source | No limit since May 18, 2021: each generation registers in turn |
| Netherlands | With conditionsAn adult Dutch citizen who voluntarily takes US citizenship loses Dutch citizenship unless one of three exceptions applies (born and living in the US, 5 years' US residence as a minor, or spouse's citizenship); a US-born child who is Dutch from birth keeps both. source | Not covered by the source quoted |
| New Zealand | YesNew Zealand allows dual or multiple citizenship. source | Not covered by the source quoted |
| Norway | YesAllowed since January 1, 2020. source | Parent only, Norwegian when you were born |
| Philippines | YesThe Philippines allows dual citizenship, but a natural-born Filipino who naturalized in the US must retain or reacquire Philippine citizenship by oath under RA 9225; it is not automatic. source | Not covered by the source quoted |
| Poland | YesTolerated: Poland treats a dual citizen solely as Polish on its territory. source | No limit, if every link was still Polish when the next child was born |
| Portugal | YesNo renunciation required; Portuguese nationality ends only by a declaration of the person. source | Parent, or grandparent with a language and culture test since May 19, 2026 |
| Romania | YesRomanian citizenship is lost only by withdrawal, approved renunciation or other cases set by law, not by taking US citizenship. source | Former citizens who lost Romanian citizenship for reasons not attributable to them, and their descendants up to the third degree, can regain or be granted it and keep their foreign citizenship (art. 11). |
| Singapore | NoSingapore does not allow adult citizens to keep another citizenship: the Constitution provides for deprivation on acquiring a foreign citizenship, and ICA's renunciation route is for citizens 21 or older who have acquired another country's citizenship. source | Not covered by the source quoted |
| Slovakia | With conditionsNo renunciation of US citizenship is asked, but a Slovak citizen who later naturalizes abroad loses it, save exceptions. source | Parent, grandparent or great-grandparent born in Slovakia (discretionary grant) |
| Slovenia | YesSlovenian law has no automatic loss when a Slovenian citizen acquires US citizenship. source | Not covered by the source quoted |
| South Korea | With conditionsA Korean who voluntarily acquires US citizenship loses Korean nationality at acquisition; dual nationality from birth is tolerated within the nationality-choice system. source | A person whose father or mother is a Korean national at the time of the person's birth is Korean at birth (Nationality Act art. 2), and must then choose under the choice system. |
| Spain | With conditionsAn option under art. 20 requires a declaration renouncing US nationality before Spanish authorities; Spaniards by origin keep both. source | Parent born in Spain (option at any age); grandchildren only through the Democratic Memory Law, closed on October 22, 2025 |
| Sweden | YesAllowed since July 1, 2001. source | Parent only, Swedish when you were born |
| Switzerland | YesSwitzerland has accepted dual nationality without restriction since January 1, 1992; a Swiss citizen who becomes a US citizen keeps Swiss citizenship. source | Not covered by the source quoted |
| Ukraine | With conditionsSince Law 4502-IX of June 18, 2025, an adult Ukrainian loses citizenship by voluntarily taking another one only if it is an aggressor state's or a state whose citizens cannot use Ukraine's simplified procedure; whether the US is on that list was not checked. source | A person whose parents, or one parent, were Ukrainian citizens at the time of birth is a Ukrainian citizen, wherever born (art. 7). |
| United Kingdom | YesDual citizenship is allowed in the UK. source | One generation born abroad (a parent born in the UK) |
| Vietnam | With conditionsVietnam's default is a single nationality unless the nationality law provides otherwise; since July 1, 2025 some applicants may keep a foreign nationality with close Vietnamese relatives and the President's permission. source | Not covered by the source quoted |
The United States does not ask you to choose; the other country's law decides whether you keep its citizenship.
Countries that allow dual citizenship let you become their citizen without giving up the one you have, and keep theirs when you take another. For a US citizen, only the other country's rule matters: the United States does not make anyone choose (State Department). Of the 44 countries in this table, read on their own laws and ministry pages in October 2026, 32 accept dual citizenship outright, 8 accept it with conditions and 4 ask you to choose. Conditions take several forms. Austria lets descendants of people persecuted by the Nazi regime keep US citizenship, but withdraws Austrian citizenship from anyone who takes another one later (Austrian foreign ministry). Slovakia does the same for citizens who naturalize abroad without five years of residence there. Spain asks people who opt for its nationality to declare that they renounce US nationality. Germany, which made people choose until June 27, 2024, now accepts multiple citizenship.
Rules read and verdicts built by Radif Partners · Editorial policy · How verdicts are built
Reading the table
- Yes: the country's law lets its citizens hold another citizenship, and does not ask a US citizen to renounce when acquiring its own.
- With conditions: dual citizenship is allowed for some routes only, or the country's citizenship is lost if you take another later.
- No: the country asks new citizens to give up their other citizenship, or ends its own when a citizen naturalizes elsewhere.
Countries with a name in blue are in the family tree checker: their descent rules are modeled line by line, with fees and waiting times on their own page. The others are listed for their dual citizenship rule and a short note on descent.
Why the date of a change matters
A rule that allows dual citizenship today does not undo losses that happened under an older rule. A German emigrant who naturalized in the United States in 1925 lost German citizenship that day, and the child born in 1930 was born to a non-German. The same logic applies to Norway before 2020, Sweden before July 2001 and the Czech Republic before 2014. This is why the checker asks the year the ancestor naturalized: it compares that year with the rule in force then, not with today's.
Conditions worth reading twice
Austria. The declaration for descendants of persecuted people (section 58c) does not ask you to give up US citizenship, but Austria withdraws its citizenship retroactively if you acquire another one after filing. Families planning several passports take the others first. Slovakia. The grant to descendants does not require renouncing, but a Slovak citizen who later naturalizes abroad loses Slovak citizenship unless an exception applies (Act 40/1993). Spain. The option open to children of Spaniards born in Spain asks for a declaration renouncing US nationality before Spanish authorities (New York consulate); under US law, that declaration alone does not end US citizenship.
The US side, in one paragraph
US law does not require a choice, does not require permission and does not end citizenship without a voluntary act and the intention to give it up. You enter and leave the United States on your US passport and keep filing US tax returns. The page on dual citizenship for Americans explains each point, and the tax page covers foreign accounts.
From the table to a passport
Allowing dual citizenship is the first filter; descent is the second. The second citizenship page ranks the routes Americans use most, from an Irish grandparent to a Polish chain of citizens, and the US and Canadian page covers the most common pair on the continent.