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| European Union member states | |
|---|---|
| Name | European Union member states |
| Caption | Flag used by the Council of the European Union and the European Commission |
| Membership | 27 member states |
| Established | 1957 (Treaty of Rome); 1993 (Treaty of Maastricht) |
European Union member states are the sovereign nations that participate in the supranational polity of the European Union, cooperating through institutions such as the European Commission, the European Parliament, the Council of the European Union, and the European Council. Members engage in common policies shaped by treaties including the Treaty of Rome and the Treaty on European Union, and interact with external partners like NATO, the United Nations, and the World Trade Organization. The membership base has evolved through successive enlargements, shaped by negotiations, accession treaties, and associated legal adaptations.
The bloc comprises 27 countries that share competencies in areas defined by the Treaty of Maastricht, the Treaty of Lisbon, and secondary legislation enacted by the European Court of Justice and the European Central Bank. States coordinate within policy frameworks overseen by the European Commission President and debated in the European Parliament where political groups such as the European People's Party, the Progressive Alliance of Socialists and Democrats, and Renew Europe contend. Membership entails obligations under rulings by the Court of Justice of the European Union and participation in external policies coordinated by the High Representative of the Union for Foreign Affairs and Security Policy.
The current members include founding participants from the Treaty of Rome era alongside later entrants from the European Economic Community expansions and post-Cold War accessions. Notable states range from large economies such as Germany, France, and Italy to Baltic members like Estonia, Latvia, and Lithuania, and to southern members like Spain and Portugal. Recent entrants came from Central and Eastern Europe, including Poland, Hungary, Czech Republic, and Slovakia, while Balkan and Mediterranean countries such as Greece and Cyprus reflect geopolitical diversity. Each member participates in the Schengen Area and the eurozone according to separate criteria and treaty obligations, with some states like Sweden and Poland outside the euro and some like Ireland and Denmark holding specific opt-outs.
Enlargement began with the original Six signatories of the Treaty of Paris and Treaty of Rome, followed by successive waves: the 1973 accession of United Kingdom, Denmark, and Ireland (the UK's membership later ended with Brexit), the 1981 and 1986 entries of Greece, Spain, and Portugal, and the post-1990s expansion welcoming former communist states during the 2004 and 2007 enlargements, which included Estonia, Latvia, Lithuania, Poland, Hungary, Czech Republic, Slovakia, Slovenia, Romania, and Bulgaria. Each accession required negotiation of the Copenhagen criteria, accession treaties ratified by national parliaments and referendums, and transitional arrangements monitored by institutions like the European Commission and the European Court of Auditors.
Member states are represented in intergovernmental bodies such as the European Council and the Council of the European Union, and supranational institutions including the European Parliament where Members of the European Parliament (MEPs) are elected under national rules. Citizens of member states hold rights conferred by the Charter of Fundamental Rights of the European Union and enjoy freedom of movement under directives and regulations administered by the European Commission and enforced by the Court of Justice of the European Union. States must transpose EU directives into national law and comply with regulations, with enforcement mechanisms including infringement procedures and potential fines adjudicated by the Court of Justice of the European Union.
The combined population and gross domestic product of member states form a major economic bloc, with large contributors like Germany and France and smaller economies such as Malta and Luxembourg. Statistical coordination is conducted by Eurostat and monetary policy for the euro adopters is set by the European Central Bank; economic governance has been shaped by responses to crises such as the 2008 financial crisis and the European sovereign debt crisis. Demographic trends vary widely, with aging populations prominent in Italy and Germany and migration patterns affecting countries like Sweden and Greece; labor mobility is regulated under directives on the free movement of workers and social security coordination overseen by the European Commission.
Territorial integrity, exclaves, and special statuses present complex legal issues for the Union, illustrated by situations involving Spanish enclaves in North Africa, the unique constitutional arrangements of Denmark regarding Greenland and the Faroe Islands, and the divided administration of Cyprus after the Turkish invasion of Cyprus. Overseas territories and special collectivities of member states—such as the French overseas departments and regions and the Netherlands constituent countries—may hold different relationships with EU law under protocols attached to accession treaties. The Court of Justice of the European Union adjudicates questions of primacy and direct effect, balancing national constitutions and EU obligations.
Member states coordinate external action with partners including Norway, Switzerland, and candidate countries like Turkey and the Western Balkans through agreements such as the European Economic Area and accession negotiations. The Union interacts with supranational organizations like the United Nations and regional bodies such as the African Union in trade, development, and security matters, and implements neighborhood policies affecting the Eastern Partnership and the Union for the Mediterranean. Disputes involving territories—referenda such as the Greenlandic withdrawal referendum and Brexit—have reshaped relationships between members and third parties, requiring treaty revisions and diplomatic engagement.