Referendums related to the European Union

Referendums related to the European Union

This is a list of referendums related to the European Union.

Enlargement of 1973

Before allowing the new candidate member states to join the European Communities, founding member France held a referendum on 23 April 1972. The turnout was 60.72%, with 68.28% in favour.

Following that approval, three of the four candidate states (Ireland, Denmark, Norway) likewise held referendums on the issue of joining the European Communities. The results were:

* - 83.1% in favour (10 May)
* - 53.5% against (25 September)
* - 63.3% in favour (2 October)

Following the rejection by the Norwegian electorate (53.5% against), Norway did not join.

The United Kingdom did not hold a referendum before joining with the Conservative government of Edward Heath. Labour's manifesto for the 1974 general election included a pledge for a referendum, so after Labour won under Harold Wilson, the referendum was held on whether to remain in the Communities. The result was 67.2% in favour, with a turnout of 64.03%.

Single European Act

On 26 February 1986, Denmark held a referendum on the Single European Act. With a turnout of 74.8%, the 56.2% of those voting were in favour.

The Tenth Amendment of the Constitution of Ireland permitted Ireland to ratify the Single European Act. It was approved by referendum on 26 May 1987. The result of the referendum was 69.9% in favour.

Maastricht Treaty

Three countries held referendums on the ratification of the treaty of Maastricht: France, Ireland and Denmark.

* IRL referendum of 18 June 1992

Result was a majority of 68.7% in favour. Turnout was 57.31%.

* FRA referendum of 20 September 1992

The treaty was verified with a slim margin of victory of 51.05% in favour. Turnout was 69.69%.


In Denmark, two referendums had to be held before the treaty of Maastricht passed. The first was held on 2 June 1992, had a turnout of 82.9% but approval of the treaty of Maastricht was denied by a slim margin, with only 47.93% in favour of the treaty.

After that defeat of the treaty, Denmark negotiated and received the following four opt-outs from portions of the treaty: Economic and Monetary Union, Union Citizenship, Justice and Home Affairs and Common Defense. A new referendum was held on 18 May 1993. There was a turnout of 85.5% of which the 56.77% voted in favour of the renegotiated treaty.

Enlargement of 1995

The 1994 referendums on membership of four new nations were as follows:

* - 66.6% in favour (12 June)
* - 56.9% in favour (16 October)
* - 52.8% in favour (13 November)
* - 52.2% against (28 November)

Austria, Sweden and Finland were admitted on 1 January 1995. As the referendum in Norway was 52.2% against joining, the proposal by the Norwegian government to join was rejected for the second time.

The Åland Islands, a dependency belonging to Finland, also voted (on 20 November 1994) on their accession to the European Union. With a turnout of 49.1% the result was 73.64% in favour, which means that EU law would also apply to the Åland Islands.

Treaty of Amsterdam

Two countries held referendums on the ratification of the treaty of Amsterdam: Ireland and Denmark.

*IRL referendum of 22 May 1998

Result was a majority of 61.74% in favour. Turnout was 56.2%.

*DNK referendum of 28 May 1998

Result was a majority of 55.1% in favour. Turnout was 76.24%.

Treaty of Nice

; Irish referendums on Treaty of NiceIn 2001 Irish voters rejected the Treaty of Nice, while in 2002 they accepted the Treaty as contemporarily understood.

Enlargement of 2004

In 2004 the new enlargement of the European Union involved ten member states of Central and Eastern Europe, as well as the Mediterranean islands of Malta and Cyprus. referendums about the accession was held in each of these nations with the exception of Cyprus.

The 2003 referendums dates (in four of the countries, a two-day ballot is held), and the outcomes in each of the candidate countries, are as follows:

* - 53.60% in favour (March 8)
* - 89.61% in favour (March 23)
* - 83.76% in favour (April 12)
* - 89.95% in favour (May 10-11)
* - 92.46% in favour (May 16-17)
* - 77.45% in favour (June 7-8)
* - 77.33% in favour (June 13-14)
* - 66.83% in favour (September 14)
* - 67.00% in favour (September 20)

Since the referendums results were all in favour of joining, ratification proceeded without problems and the candidate countries became full members of the EU on 1 May 2004.


Denmark and the United Kingdom received opt-outs from the Maastricht Treaty and do not have to join the euro until they choose to do so; Sweden has not received an opt-out, yet refuses to join for now, as well. Two referendums have been held on the issue up to now, both of which failed:

* - 53.2% against, turnout 87.6% on 28 September 2000
* - 56.1%% against, turnout 81.2% on 14 September 2003

Denmark will hold another referendum, this time on abolishing all of the opt-outs, at some point before 2011.

European Constitution

Several member states used or intended to use referendums to ratify the Treaty establishing a Constitution for Europe (TCE).

The results were as follows:
* - 76.7% in favour (February 20, 2005)
* - 54.68% against (May 29, 2005)
* - 61.5% against (June 1, 2005)
* - 56.52% in favour (July 10, 2005)

Referendums were planned, but not held, in:
* Czech European Constitution referendum
* Danish European Constitution referendum
* Irish European Constitution referendum
* Polish European Constitution referendum
* Portuguese European Constitution referendum
* United Kingdom European Constitution referendum

Treaty of Lisbon

Only one member state, the Republic of Ireland, intended to ratify the Treaty of Lisbon through a referendum.

* - 56.3% against (June 12, 2008)

Future enlargements

Countries which seek to join the European Union in the future may hold a referendum as part of the accession process. In addition, Article 88-5 of the Constitution of France requires a referendum there to ratify any future accession treaty. [] Politicians in other existing members have proposed referendums in their states, particularly with reference to the accession of Turkey.


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