The European Court of Auditors is the supreme audit institution of the European Union (EU). It was established in 1975 in Luxembourg and is one of the seven EU institutions. The Court comprises one member from each EU member state supported by approximately 800 civil servants.

The European Union (EU) is a supranational political and economic union of 27 member states that are located primarily in Europe. The Union has a total area of 4,233,255 km2 (1,634,469 sq mi) and an estimated total population of over 448 million. The EU has often been described as a sui generis political entity combining the characteristics of both a federation and a confederation.