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What Countries Are In The EU?

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Last updated on 3 min read
27 countries make up the European Union as of 2026, covering 4.23 million km² and hosting 448 million people.

Where exactly does the EU sit on the map?

Picture Europe’s central-western stretch—from the Atlantic on the left to the Black Sea in the southeast. That’s essentially the EU’s footprint. It’s not just geography; this union turns 27 different countries into one political and economic powerhouse. Goods, services, and people move freely across borders. With a combined GDP of €18.4 trillion, the EU ranks right up there with the U.S. and China in global economic clout.

What are the hard numbers behind the EU?

Category Data (as of 2026)
Member countries 27
Total area 4.23 million km²
Combined population 448 million
Official languages 24
Eurozone members 20
Schengen Area members 26

How did the EU actually begin?

It all kicked off with the 1951 Treaty of Paris, creating the European Coal and Steel Community among six original members. Then came the 1957 Treaty of Rome, which launched the European Economic Community. Since then, the EU has expanded through seven enlargement rounds—the last one in 2013 when Croatia joined. The UK made history as the first country to leave, wrapping up its exit on 31 January 2020 after 47 years inside. Greenland departed in 1985 following a referendum, and French Algeria became independent in 1962.

Which countries aren’t in the EU, and why?

Some European nations stay out but still keep close economic ties. Norway, Iceland, and Liechtenstein team up in the European Economic Area, giving them single-market access without full EU membership. Switzerland works through bilateral deals. Tiny states like Monaco, San Marino, and Vatican City use the euro and have open borders with the Schengen Area, even without EU membership.

  • Albania – Has been a candidate since 2014, with talks still in progress.
  • Turkey – Joined accession talks in 2005 but negotiations have been stuck since 2016.
  • Serbia and Montenegro – Both are candidates aiming to join by 2030.
  • United Kingdom – Left in 2020; now trades under the EU-UK Trade and Cooperation Agreement.

How can a country actually join the EU today?

Applicants must meet the Copenhagen Criteria: a stable democracy, solid rule of law, a working market economy, and a commitment to adopt all EU laws. The timeline varies wildly—Finland and Austria breezed in within three years, while others take much longer. As of 2026, Bosnia and Herzegovina is an official candidate, while Georgia, Moldova, and Ukraine are labeled potential candidates until they make progress on reforms.

For the latest updates, check the European Commission’s enlargement page, where official reports and timelines live.

James Cartwright
Author

James Cartwright is a geography writer and former high school geography teacher who has spent 20 years making maps and distances interesting. He can name every capital city from memory and insists that geography is the most underrated subject in school.

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