The institutions of the European Union are the seven principal decision-making bodies of the European Union and the Euratom. They are, as listed in Article 13 of the Treaty on European Union:the European Parliament, the European Council, the Council of the European Union, the European Commission, the Court of Justice of the European Union, the European Central Bank and the European Court of Auditors.

The Treaty on European Union (2007) is one of the primary Treaties of the European Union, alongside the Treaty on the Functioning of the European Union (TFEU). The TEU forms the basis of EU law, by setting out general principles of the EU's purpose, the governance of its central institutions, as well as the rules on external, foreign and security policy.