Referendums related to the European Union

The 2004 enlargement of the European Union involved ten candidate states, eight from Central and Eastern Europe, and the Mediterranean islands of Malta and Cyprus.

A referendum was held in San Marino on whether the country should submit an application to join the European Union as a full member state.

Countries which seek to join the European Union in the future may hold a referendum as part of the accession process.

In Armenia, a hearing in the National Assembly on 21 June 2024 was organized by the United Platform of Democratic Forces (UPDF), to consider holding a referendum on the submission of an application for EU membership.

[10] On 27 June 2024, the president of the National Assembly, Alen Simonyan, confirmed that Armenia's leadership wants the country to join the EU and that it will hold a referendum in the near future.

[12] The constitution of France (Article 88-5) requires that any future treaty on the accession of new EU member states be approved in a referendum.