A Complete Guide to the EU: Countries, Population, and Must-Know Facts

The European Union (EU), founded in 1951 by six countries and now comprising 27 member states, is a unique political and economic union with open borders, a single market, and shared institutions. With over 448 million people, including 41 million foreign residents, the EU emphasizes multiculturalism and free movement through the Schengen area. It operates as a single market with 20 countries using the euro, a GDP of €17 trillion, and extensive global trade links, particularly with the United States and China. The EU is committed to climate neutrality by 2050, expanding renewable energy while reducing fossil fuel dependence. 

Citizens enjoy a high quality of life, though challenges remain in unemployment, gender pay gaps, ageing populations, and poverty risk. The EU is a global leader in tourism, culture, and multilingual education, with over 4 million university graduates annually and programs like Erasmus+ supporting student exchanges across Europe.

Who’s in the EU Today?

As of 2025, the European Union (EU) is made up of 27 member states, spread across almost every part of the continent. The members include Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, and Sweden. Together, these countries represent a population of nearly 450 million people and share a single market, common trade policies, and unified laws in many areas.

Who’s Looking to Join?

The EU continues to stand as one of the world’s strongest political and economic unions, promoting cooperation in areas such as security, environment, digital innovation, and global diplomacy. While the United Kingdom exited the EU in 2020 (Brexit), the current 27 members remain committed to strengthening the bloc. In addition, several candidate countries like Ukraine, Moldova, Georgia, and the Western Balkan states are working toward future accession, signaling that the EU may expand further in the years ahead.

What Does It Take to Join?

Countries hoping to join must meet the Copenhagen criteria, including democratic governance, respect for human rights, a functioning market economy, and adopting EU laws and values.

Know More about European Union:

FeatureDetails
Population & SizeThe EU spans over 4.2 million km² and houses about 450 million people as of 2025.
Open BordersMost member states belong to the Schengen Area, allowing seamless, passport-free travel. As of 2025, Bulgaria and Romania joined fully.
Migration TrendsMigration has helped offset natural population decline, adding over 2 million residents in the last year.

Why It Matters

The EU is a symbol of unity, peace, and prosperity. Its structure promotes shared success, economic stability, and the protection of citizens’ rights across Europe. Whether you’re a student, traveler, or global citizen, understanding the EU enriches your view of international cooperation at its best.

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