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Britannica Sources used in this answer

Which countries joined the European Union in 2004?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
Map showing the countries of Europe with national capitals and surrounding bodies of water, including the Atlantic Ocean, Mediterranean Sea, and Black Sea.
Europe Political map of Europe.

In 2004, the European Union admitted 10 new member countries. These nations were:

With the exception of Cyprus and Malta, all of these countries were former communist states.12