Which countries allow, restrict or do not allow dual citizenship?

Most countries today allow citizens to hold dual or multiple citizenship. However, there are still countries which pose restrictions or do not allow dual citizenship. Some countries that prohibit dual citizenship do make exceptions in special circumstances such as international treaties, or in the case where both of a child’s parents have two separate citizenships.

For more information on the legal status of dual citizenship in your country, please refer to the Dual Citizenship Report or the country profiles.