This is a list of referendums related to the European Union, or referendums related to the European Communities, which were predecessors of the European Union. Since 1972, a total of 48 referendums have been held by EU member states, candidate states, and their territories, with several additional referendums held in countries outside of the EU. The referendums have been held most commonly on the subject of whether to become a member of European Union as part of the accession process, although the EU does not require any candidate country to hold a referendum to approve membership or as part of treaty ratification. Other EU-related referendums have been held on the adoption of the euro and on participation in other EU-related policies.
A non-binding referendum on the Single European Act was held in Denmark on 27 February 1986. It was approved by 56.2% of voters, with a voter participation of 75.4%.
A referendum on the Act of Union was held in Iceland on 19 October 1918. Voters were asked whether they approved of the Act, which would lead to Iceland becoming a separate kingdom under the Danish Crown, making the country a sovereign state in a personal union with Denmark. It was approved by 92.6% of voters.
A referendum on prohibition was held in Finland on 29 and 30 December 1931. Voters were asked whether they approved of the continuation of the prohibition law passed in 1919. Of the three options presented, the complete abolition of prohibition was backed by 70.5% of voters with a turnout of only 44.4%.
A constitutional referendum was held in Lithuania on 10 November 1996 alongside the second round of the parliamentary elections. Voters were asked whether they approved of an amendment to Article 47 of the constitution to add a paragraph allowing EU citizens to buy agricultural land. Although it was approved by 52% of those voting, voter turnout was only 39.7% and the referendum failed to pass the threshold of 50% of registered voters in favour.
A referendum on the electoral law was held in San Marino on 3 July 2005. Voters were asked four questions on changes to the electoral law and electoral system. Although all four were approved by a majority of those voting, voter turnout was just 21.7%, meaning that the quorum of 32% of registered voters (10,143) was not achieved for any question. This resulted in all four questions failing, including two that proposed raising the quorum to 40%.
Three referendums were held in Switzerland in 1882. Two were held on 30 July on copyright law and measures against epidemics, both of which were rejected. The third was held on 26 November on executing article 27 of the federal constitution, and was rejected by 64.9% of voters.
Two referendums were held in Switzerland in 1887. The first was held on 15 May, asking voters whether they approved of a federal law on spirits, and was approved by 65.9% of voters. The second was held on 10 July, asking voters whether they approved of an amendment made to article 64 of the federal constitution, and was approved by 77.9% of voters and 20.5 cantons.
A referendum on foodstuffs was held in Switzerland on 10 June 1906. Voters were asked whether they approved of a new federal law concerning foodstuffs and basic commodities. The proposal was approved by 62.6% of voters.
A referendum on the armed forces was held in Switzerland on 3 November 1907. Voters were asked whether they approved of the organisation of the federal armed forces. The proposal was approved by 55.2% of voters.
A referendum on insurance was held in Switzerland on 4 February 1912. Voters were asked whether they approved of a federal law on health and accident insurance. The proposal was approved by 54.4% of voters.
A referendum on unfair competition was held in Switzerland on 29 October 1944. Voters were asked whether they approved of a new federal law on unfair competition. The proposal was approved by 52.9% of voters.
A referendum on European Union membership was held in the Åland Islands on 20 November 1994. Although a referendum had been held in mainland Finland on 16 October, the islands held a separate vote as they were a separate customs jurisdiction. EU membership was approved by 73.64% of voters.
Three referendums were held in Switzerland during 1925. The first was held on 24 May on a popular initiative calling for insurance for invalidity, old age and bereavement, and was rejected by voters. The second was held on 25 October on a federal resolution on the settlement and residence of foreigners, and was approved by a majority of voters and cantons. The third was held on 6 December on a federal resolution on insurance for invalidity, old age and bereavement, and was also approved by a majority of voters and cantons.
Two referendums were held in Switzerland during 1928. The first was held on 20 May, asking voters whether they approved of amending article 44 of the constitution regarding measures against foreign infiltrators, and was approved by a majority of voters and cantons. The second was held on 2 December, asking voters whether they approved of the "Kursaalspiele" popular initiative on gambling, and was also approved.
Four referendums were held in Switzerland in 1981. The first was held on 5 April on a popular initiative "for a new policy on foreigners." Known as the "Mitenand Initiative", it was rejected by 84% of voters. The next two referendums were held on 14 June on popular initiatives for gender equality and the protection of consumer rights, both of which were approved. The final referendum was held on 29 November on prolonging the federal finance order, and was also approved.
Eleven referendums were held in Switzerland during 2001. The first three were held on 4 March on popular initiatives on joining the European Union, lowering medicine prices and lowering the urban speed limit to 30 km/h in most places. All three were rejected by voters. The next three referendums were held on 10 June on two separate amendments to the federal law on the Swiss army and on a federal resolution on abolishing the requirement for a permit to establish a diocese, all of which were approved.
Five referendums were held in Switzerland during 1997. The first three were held on 8 June on two popular initiatives "EU accession talks in front of the people" and "for a ban on arms exports" and a federal resolution on ending the federal monopoly on producing and selling gunpowder. The two popular initiatives were both rejected, whilst the end of the gunpowder monopoly was approved.
Thirteen referendums were held in Switzerland during 1994. The first five were held on 20 February on federal resolutions on roadbuilding, continuing existing truck tolls and varying tolls based on engine power or mileage, as well as a popular initiative "for the protection of the alpine region from through traffic" and an amendment to the aeronautical law. All five were approved by voters. The second set of referendums was held on 12 June on federal resolutions on an article on the Swiss Federal Constitution on the promotion of culture and a review of the procedure for naturalising young immigrants, as well as a federal law on Swiss troops in peacekeeping operations. Whilst the resolutions were both approved by a majority of voters, they did not receive the approval from the majority of cantons, so were rejected, as was the law on troops.
Fifteen referendums were held in Switzerland during 2000. The first five were held on 12 March on reforming the judiciary and four popular initiatives; "for speeding up direct democracy ", "for a just representation of women in federal authorities", "for the protection of men against manipulations in procreation technology" and one to reduce motorised road by 50%. Whilst the judiciary reform was approved, all four popular initiatives were rejected. The next referendum was held on 21 May to authorise sectoral agreements between Switzerland and the European Union, and was approved by around two-thirds of voters.
