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Dual nationality

What this indicator measures

Dual nationality means being a citizen of two countries at the same time. Some countries accept it freely, others accept it only in certain cases (agreement between countries, prior authorisation, etc.) and others refuse it.

How to read this?

“Recognised” means the country accepts that a citizen also holds another nationality; “Recognised under conditions” means it is accepted only in certain cases; “Not recognised” means it is not accepted.

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191countries with data
2026data year(s)

In brief

Dual nationality: 191 countries and territories covered. Breakdown: Dual nationality recognised : 78 ; Recognised under conditions : 15 ; Not recognised : 98.

Why this indicator matters

Many people have ties to two countries: birth, marriage, family, migration. Knowing whether the law accepts dual nationality helps us understand what happens to these people's citizenship.

What makes this indicator vary

Positions reflect each country's history: emigration or immigration, the idea of loyalty to the state, bilateral agreements. Many laws have been relaxed with international mobility.

Reading precautions

The “under conditions” category groups very different situations: birth, naturalisation, marriage. The rules also depend on the person's country of origin. Official texts should be checked for a specific case.

Dual nationality

Dual nationality recognised (78)

Recognised under conditions (15)

Not recognised (98)

Frequently asked questions

Where does the "Dual nationality" data come from?

It comes from CIA World Factbook (Citizenship). Site last updated: November 8, 2026. Each country is shown with the year of its most recent value.

What is dual nationality?

It means being a citizen of two countries at the same time, in principle with the rights and duties attached to each. Each country decides for itself whether to accept it.

What does “recognised under conditions” mean?

Dual nationality is accepted only in certain cases, for example depending on how the nationality was acquired, an agreement between countries or a prior authorisation.

Source and update

Source : CIA World Factbook (Citizenship). Site last updated: November 8, 2026.

Indicators in the same category : Family & Nationality