Top 35 Countries That Allow Dual Citizenship (2026)

Around 100 countries explicitly allow dual citizenship in 2026, based on the CitizenX Dual Citizenship Index, which tracks nationality rules across all 197 countries from official government sources. Most lists stop there and give you an alphabet of country names, which is true and useless. Permission is not access. Sweden allows dual citizenship, and that fact is worth nothing to you unless you can live there for five years or find a Swedish grandparent.

So this list is filtered for access. Below are the 35 countries that allow dual citizenship and offer you a realistic route in: twelve through investment, nine through ancestry, ten through fast naturalization, and four through exceptional grant. For any country not listed here, the index has the full rules.

Two housekeeping notes. "Allows dual citizenship" here means the country permits its naturalized and natural-born citizens to hold another nationality without losing this one. And rules change; Germany flipped to full allowance in June 2024, Ukraine largely followed in June 2025, so treat any static list (including ours) as a snapshot and the index as the living source.

Dual citizenship by investment: 12 countries

Every citizenship by investment program on earth allows dual citizenship, for the obvious commercial reason: nobody pays $250,000 for a passport that costs them their first one. These twelve run formal, legislated programs as tracked on the CitizenX index.

1. St. Kitts & Nevis

The oldest CBI program in the world, running since 1984. From $250,000 (Sustainable Island State Contribution) for a single applicant. Strong Caribbean passport with Schengen and UK access. The program that survived four decades of scrutiny is the one to benchmark others against.

2. Dominica

From $200,000 donation. One of the most affordable credible programs, with a long track record and family-friendly pricing. Not to be confused with the Dominican Republic, a mistake that has ruined at least one dinner party.

3. Grenada

From $235,000. Two features set it apart: visa-free access to China, and eligibility for the US E-2 investor visa through Grenada's treaty, which makes it the Caribbean program of choice for people with US business plans.

4. St. Lucia

From $240,000, with donation, bond, and real estate routes. The youngest Caribbean program (2016) and often the most flexible on structuring.

5. Antigua & Barbuda

From $230,000, and the best per-head deal for larger families; a family of four typically comes in around $260,000 all-in. Five-day residence requirement over five years, which is a long weekend.

6. Türkiye

$400,000 in real estate. The world's highest-volume program. The passport is weaker for Europe (no Schengen-free access) but the E-2 treaty route to the US and the real-estate recoverability make the economics attractive.

7. Egypt

From $250,000 donation or real estate routes. A newer program (2020) with a regionally useful passport; mostly relevant for applicants with Middle East and Africa business interests.

8. El Salvador

The $1m "Freedom Visa" program, paid in USD or bitcoin. A statement purchase more than a mobility purchase for now, but it exists, it is legislated, and it allows dual citizenship.

9. Vanuatu

From $130,000, the cheapest and fastest formal program (as little as two months). The caveat is loud: Vanuatu lost EU visa-free access in 2022 over due-diligence concerns. You get what you pay for in this market.

10. Nauru

Launched in 2024 to fund climate resilience, from $105,000. A novel program from the world's third-smallest country; the passport is modest, the story is real.

11. São Tomé & Príncipe

From $90,000, one of the newest and least expensive entries. Early-stage program; appropriate only for applicants who understand pioneer risk.

12. Sierra Leone

The newest program tracked in the index, with contribution routes from around $140,000. Same caveat as above: young programs carry young-program risk.

Dual citizenship by descent: 9 countries

These countries allow dual citizenship and will recognize you as a citizen today if you have the right ancestor. Cost is measured in archive fees and patience, not capital. If any of these might apply to you, check before considering the investment routes above; this is the best value in the market.

13. Ireland

One grandparent born on the island of Ireland qualifies you through the Foreign Births Register. An EU passport for roughly €300 in fees. Tens of millions of Americans qualify and most have never checked.

14. Italy

Citizenship by descent with no generational limit in principle, though a 2025 decree significantly tightened eligibility (broadly, toward two generations). Claims in progress and edge cases need legal review, but the route remains one of the largest in the world.

15. Poland

Qualifies descendants of ancestors who held Polish citizenship after 1920 and did not lose it. Paper-heavy, very much worth it: it is an EU citizenship.

16. Lithuania

Descendants of citizens of interwar Lithuania (1918–1940) who left before 1990 can reinstate citizenship. Lithuania restricts dual citizenship generally but carves out exactly this group, which is why it makes this list. Our Lithuania ancestry guide covers the documents.

17. Czechia

The 2019 amendment reopened citizenship for descendants of former Czechoslovak citizens. Quick if your chain is clean; our Czech ancestry guide has the details.

18. Slovakia

Since 2022, descendants of Czechoslovak citizens born in what is now Slovakia can claim through a simplified route, up to great-grandchildren.

19. Croatia

Ethnic Croats and descendants of emigrants qualify with a generous generational reach. An EU passport with one of the more accessible descent standards.

20. Romania

Descendants up to the third degree of former Romanian citizens, including from territories Romania held between the wars (parts of present-day Moldova and Ukraine), can restore citizenship.

21. Canada

First generation born abroad acquires citizenship automatically, and 2025 legislative changes (responding to the Bjorkquist ruling) extended claims for some second-generation cases with a substantial-connection test. Not European, but one of the strongest passports on this list.

Hungary deserves an honorable mention here: its simplified naturalization requires Hungarian ancestry plus conversational Hungarian, which moves it just outside a pure descent claim. Our Hungary guide covers whether the language bar is realistic for you.

Fast or notable naturalization: 10 countries

These countries allow dual citizenship and naturalize on unusually short or practical timelines. You have to actually live there; that is the price and, for many people, the point.

22. Argentina

Two years of residence, the shortest mainstream clock in the world. Courts have repeatedly upheld flexible interpretations. A strong passport and a country that still wants immigrants.

23. Peru

Two years of legal residence. Less famous than Argentina's route and comparably short.

24. Paraguay

Three years, with low physical-presence enforcement historically (do not build a plan on lax enforcement; build it on the law). Popular with the flag-theory crowd for decades.

25. Brazil

Four years, dropping to one with a Brazilian spouse or child. Portuguese required. One quirk worth knowing: Brazil almost never extradites its citizens, a fact that attracts both the prudent and the problematic.

26. Poland (naturalization route)

Three years as a permanent resident. Doubles as the naturalization backup for people whose Polish descent claims fall just short.

27. Portugal

Five years of legal residence, with language at A2. The rules have been under active political revision through 2025–2026 (proposals to lengthen the clock), so verify current requirements. Still the default answer to "which EU country should I actually move to."

28. Uruguay

Three years with family, five without. A stable, pleasant, dual-friendly democracy; the citizenship-vs-legal-nationality distinction has historically complicated its passports, and 2024–2025 reforms addressed it, so check current status.

29. Dominican Republic

Two years of residence after permanent residency, among the fastest in the hemisphere, with an investor fast-track to permanent residency in months.

30. Mexico

Five years, two with a Mexican spouse or child. Spanish and a civics test required. An underrated passport and an even more underrated place to hold one.

31. Germany

On this list because of what changed: since June 2024, Germany allows dual citizenship for all naturalizing citizens, ending decades of forced renunciation, and cut its clock from eight years to five (three in exceptional cases). One of the biggest dual-citizenship liberalizations of the decade.

Citizenship by exception or merit: 4 countries

Discretionary grants for people a government decides it wants. Not a route you apply to so much as one you qualify for by being useful.

32. Serbia

Grants citizenship by merit through government decision, with dual citizenship allowed; recent grants have gone to athletes, founders, and cultural figures. We cover the practical route in our Serbia citizenship by merit guide.

33. North Macedonia

Special-interest naturalization for economic and cultural contributors, used actively in recent years.

34. Montenegro

Its formal CBI program closed in 2022, but honorary and special-merit citizenship remains available by government discretion, mostly for athletes and figures of national interest.

35. France

Naturalizes foreign nationals for exceptional service, most visibly through the Foreign Legion ("Français par le sang versé," French by spilled blood) and occasional acts of heroism. Listed less as a plan and more as proof that every state keeps this door.

The conditional middle: countries that allow dual citizenship sometimes

Between the roughly 100 that allow and the 28 that prohibit sits a group whose one-word status ("restricted") hides usable openings. Worth knowing if your ancestry or plans touch them:

Spain allows dual citizenship only with Ibero-American countries, Portugal, France, Andorra, the Philippines, and Equatorial Guinea. A Mexican or Argentine can naturalize in Spain keeping both; an American technically cannot, though Spain's renunciation declaration is famously toothless in practice. Spain also runs two-year fast-track naturalization for Latin American citizens, which composes nicely with an Argentine passport acquired first.

The Netherlands bans dual by default but exempts spouses of Dutch citizens and refugees, among others. Austria requires advance permission and grants dual citizenship to descendants of Nazi persecution victims (a route thousands of Americans and Israelis have used since 2020). Lithuania and Latvia, as noted above, carve out their historical diasporas while restricting everyone else. South Korea since 2011 lets certain dual nationals keep both by pledging not to exercise the foreign nationality inside Korea, an odd but functional compromise. Egypt allows dual with permission that is routinely granted, which is why its CBI program works.

The pattern across the middle group: exceptions track diasporas and marriages. If you have a blood or marriage connection to a "restricted" country, read the actual statute (or check the index) before assuming the door is closed.

How to verify any country's rules before you act

Three-step verification we use internally, and recommend to anyone: first, check the country on the CitizenX Dual Citizenship Index, which we review against primary sources. Second, confirm against the country's own nationality law or interior ministry page, because secondary sources (including every list article on the internet, including this one) go stale; Germany's 2024 change took most lists a year to register. Third, for any decision involving real money or an irreversible step, pay a nationality lawyer in that country for two hours. The order matters: free lookup, primary source, professional confirmation. Most mistakes in this field come from doing step one and skipping to the wire transfer.

How many countries allow dual citizenship in total?

Roughly 100 of 197 permit it explicitly, and the trend line points one way: Germany (2024) and Ukraine (2025) are the latest major liberalizations, and each decade the prohibition list gets shorter. About 40 countries still ban or heavily restrict it, and a middle group tolerates it with conditions (permission requirements, or allowance only for citizens by birth). The CitizenX Dual Citizenship Index tracks the current status for every country, reviewed against official government sources.

If your current country is in the restrictive group, that changes your entire calculus, and you should read our companion piece: the list of countries that do NOT allow dual citizenship. Americans should also see our US dual citizenship countries list for the US-specific rules.

What "allowing dual citizenship" gets you beyond the passport

A detail the pure lists miss: several of these citizenships come bundled with regional rights that multiply their value. The five Caribbean CBI citizenships sit inside CARICOM, whose freedom-of-movement regime expanded substantially in 2024–2025; a Dominica or St. Lucia passport increasingly means living and working rights across much of the Community, not one island. Any EU citizenship on the descent list (Ireland, Italy, Poland, Czechia, Slovakia, Croatia, Romania, Lithuania) is 27 countries of residence and work rights wearing one passport. Mercosur citizenships (Argentina, Brazil, Paraguay, Uruguay) carry residence rights across South America's southern cone. And Türkiye's E-2 treaty with the US turns its passport into a business-immigration instrument for a country it has no other special access to.

So when comparing two "dual-allowed" citizenships, compare the blocs behind them. A passport is rarely just its own country anymore, and the gap between a bloc passport and a standalone one is usually worth more than the gap in visa-free counts.

Frequently asked questions

What is the easiest country to get dual citizenship from? If you have Irish or Italian ancestry, those descent claims are the easiest meaningful citizenships on earth. Without ancestry: Argentina by residence (two years) or a Caribbean program by investment (four to nine months).

What is the cheapest dual citizenship? By descent: a few hundred to a few thousand dollars if you qualify. By investment: São Tomé & Príncipe and Vanuatu are cheapest on paper, but the Caribbean five deliver far more passport per dollar at $200,000+.

Can I hold three citizenships? If each country involved permits multiple nationality, yes. Nothing in international law caps the number; we know people carrying four.

Do all these countries let me keep my original citizenship? Yes, that is the admission criterion for this list, from their side. Whether your current country lets you take a second one is the other half of the question; check it on the index.

Which countries changed their rules recently? Germany began allowing dual citizenship for all naturalizers in June 2024. Ukraine signed multiple citizenship into law in June 2025. Italy tightened descent eligibility in 2025. Malta's investment program was ended by an EU court ruling in April 2025.

Do the US and UK allow dual citizenship? Both, fully and without permission requirements. The US position is covered in detail in our US dual citizenship countries list; the UK has allowed dual nationality since 1948.

Which EU countries allow dual citizenship? Most of them now: France, Italy, Ireland, Portugal, Sweden, Finland, Denmark (since 2015), Germany (since 2024), Poland, Czechia, Croatia, Romania, and others. The holdouts with restrictions are Austria, the Netherlands, Estonia, Lithuania, Latvia, and Spain's country-specific regime.

Can I get dual citizenship without living in the other country? Yes, by descent (you already hold it; the paperwork just proves it) or by investment (no residence requirements in any of the twelve programs). Naturalization is the only route that requires living there.

Find your route

Thirty-five countries, four doors: money, blood, time, or merit. The efficient move is to check them in that reverse order of glamour: ancestry first (free to check, cheapest to claim), then residence plans, then investment. The Dual Citizenship Index will tell you where you stand in five minutes, and our team can tell you which specific program or claim fits your family, timeline, and budget. If your grandmother was born in Cork, we will be recommending a €300 route, not a $250,000 one.

CitizenX is not a law firm and does not provide legal or tax advice. Citizenship rules change; verify against official government sources before acting. Data referenced from the CitizenX Dual Citizenship Index, last reviewed May 2026.