The A8 countries, also referred to as the EU8, are a group of eight of the 10 countries that joined the European Union during its 2004 enlargement. They are commonly grouped together separately from the other two states that joined in 2004, Cyprus and Malta, because of their relatively lower per capita income levels in comparison to the EU average. The countries were:
A particular reason for grouping the A8 countries was an expectation that they would be the origin for a new wave of increased migration to wealthier European countries. They subsequently did prove to be the origin of a new wave of migration, with many immigrants travelling from these countries to wealthier countries within the EU.