Which EU referenda have taken place in EU member states?

Ireland and Denmark have held nine and eight EU referenda and are thus the two countries which have had most referenda on EU issues. Referenda have been held in EU countries on the following issues:

EU Referenda
Year Subject Yes No Turnout
Denmark
1972 Denmark's accession to the EEC 63.4 % 36.6 % 90.1 %
1986 The Single European Act 56.2 % 43.8 % 75.4 %
1992 The Maastricht Treaty 49.3 % 50.7 % 83.1 %
1993 The Maastricht Treaty + The Edinburgh agreement 56.7 % 43.3 % 86.5 %
1998 The Amsterdam Treaty 55.1 % 44.9 % 76.2 %
2000 Denmark's accession to the Single European Currency 46.8 % 53.2 % 87.6 %
2014 The Unified Patent Court 62.5 % 37.5 % 55.8 %
2015 Opt-out on justice and home affairs 46,9 % 53,1 % 72,0 %
Estonia
2003 Estonia's accession to the EU 66.83% 33.17% 64.06%
Finland
1994 Finland's accession to the EC 56.9% 43.1% 74 %
1994 Aaland Islands' accession to the EC 73.6% 26.4% 49.1%
France
1972 Whether the ECC should be enlarged to include Denmark, Ireland and the United Kingdom 68.32% 31.68% 60.24%
1992 The Maastricht Treaty 51.05% 48.95% 69.70%
2005 The Constitutional Treaty 45.32% 54.68% 69.37%
Greenland
1982 Whether Greenland should resign from the EC (consultative referendum) 47% 53% 74.9%
Ireland
1972 Ireland's accession to the ECC 83.1% 16.9% 70.9%
1987 The Single European Act 69.9% 30.1% 43.9%
1992 The Maastricht Treaty 69.1% 30.9% 57.3%
1998 The Amsterdam Treaty 61.7% 38.3% 56.2%
2001 The Nice Treaty  46.1% 53.9% 34.8%
2002 The Nice Treaty 62.89% 37.11% 49.47%
2008 The Lisbon Treaty 46.6% 53.4% 53.1%
2009 The Lisbon Treaty 67.13% 32.87% 59.0%
2012 The Fiscal Compact 60.29% 39.71% 50.6%
Croatia
2012  Croatia's accession to the EU  66.7%
 33.3%
 43.5%
Latvia
2003 Latvia's accession to the EU 67.7% 32.3% 72.53%
Lithuania
2003 Lithuania's accession to the EU 91.07% 8.93% 63.37%
Luxembourg
2005 The Constitutional Treaty 56.52% 43.48% Compulsory
Malta
2003 Malta's accession to the EU 53.65% 46.35% 91%
The Netherlands
2005 The Constitutional Treaty

38.5% 61.5% 63.3%
 2016 Ukraine-EU Association Agreement
 38.21% 60.0%  31.7%
Poland
2003 Poland's accession to the EU 77.45% 22.55% 58.85%
Slovakia
2003 Slovakia's accession to the EU 92.46% 6.20% 52.15%
Slovenia
2003 Slovenia's accession to the EU 89.61% 10.39% 60.29%
Spain
2005 The Constitutional Treaty 76.73% 17.24% 42.32%
The United Kingdom
1975 Continued British Membership of the ECC 67.2 % 32.8 % 64%
2016 Continued British membership of the EU 48.1% 51.9% 72.2%
Sweden
1994 Sweden's accession to the EC 52.8% 47.2% 83.3%
2003 Whether Sweden should introduce the euro 42 % 55.9% 82.6%
The Czech Republic
2003 The Czech Republic's accession to the EU 77.33% 22.67% 55.21%
Hungary
2003 Hungary's accession to the EU 83.76% 16.24% 45.62%
Austria
1994 Austria's accession to the EC 66.6% 33.4% 81.3%
Greece
 2015  Bail - Out Conditions  38.69%  61.31%  62.5%

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