The Canadian Encyclopedia — neutral, cited, updated
July 27, 2026Sources cited
Canadianwire.
Canada’s encyclopedia & explainer
HomePolitics & WorldInternational OrganizationsEuropean Union
Politics & World • International Organizations

European Union

The European Union (EU) is a political and economic union of 27 member states, located primarily in Europe.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

The European Union (EU) is a political and economic union of 27 member states, located primarily in Europe. It operates through a system of shared institutions and common policies in areas such as trade, the single market, agriculture, justice, and foreign affairs. The EU developed from postwar European integration efforts that began in the 1950s and became the European Union in 1993 under the Maastricht Treaty.

History

European integration began in the aftermath of the Second World War, with the first communities founded in 1951. The founding members were Belgium, France, Germany, Italy, Luxembourg, and the Netherlands. The European Union in its current form was created by the Maastricht Treaty, which entered into force in 1993.

Institutions and governance

The EU has a distinctive institutional system made up of European institutions, bodies, and agencies that work for common interests. Core institutions include the European Parliament, the Council of the European Union, and the European Commission.

Single market and currency

One of the EU’s main features is its single market, which allows the movement of goods, services, capital, and people among member states. The euro is the common currency for 20 member states, though not all EU members use it.

Membership and geography

The EU currently has 27 member states and several candidate countries seeking accession. It is located primarily in Europe and includes a large share of the continent’s population and economic output. The United Kingdom left the EU in 2020.

Public role

The EU coordinates policies affecting daily life, including trade, agriculture, digital regulation, justice, and foreign affairs. It has also been recognized internationally, including the Nobel Peace Prize in 2012.

Key facts

  • The EU is a supranational union with 27 member states.
  • Its modern origins date to 1951, while the EU as such was established by the Maastricht Treaty in 1993.
  • The EU operates a single market and shares common institutions across member states.
  • The euro is used by 20 member states.
  • The United Kingdom left the EU in 2020.
🍁
Canadian context

Canada and the European Union have a significant trade and diplomatic relationship. For Canadian readers, the EU matters as a major market, a standards-setting bloc, and a partner in international cooperation.

Frequently asked questions

What is the European Union?
The European Union is a political and economic union of 27 European member states that cooperate through shared institutions and common policies.
When was the EU founded?
The EU’s origins date to 1951, but it was established in its modern form in 1993 when the Maastricht Treaty entered into force.
How many countries are in the EU?
There are 27 member states in the European Union.
What is the EU’s main currency?
The euro is the EU’s common currency, used by 20 member states.
Where is the EU headquartered?
Brussels, Belgium, is the main administrative centre of the European Union.
Is the United Kingdom still in the EU?
No. The United Kingdom left the European Union in 2020.

References

  1. European Unionhttps://european-union.europa.eu/principles-countries-history/facts-and-figures-european-union_en
    Supports: Member states, founding origins, population, institutional setup, single market
  2. Encyclopaedia Britannicahttps://www.britannica.com/topic/European-Union
    Supports: EU definition, membership, Maastricht Treaty, UK withdrawal, Nobel Prize
  3. Statistahttps://www.statista.com/topics/921/european-union/
    Supports: Euro use, Schengen, official languages, main institutions
  4. CountryReports.orghttps://www.countryreports.org/global/european-union
    Supports: Political and economic union, modern formation, policy areas
  5. Wikipediahttps://en.wikipedia.org/wiki/European_Union
    Supports: Population, legal status, Maastricht Treaty and Lisbon Treaty details
  6. CNNhttps://www.cnn.com/2013/06/06/world/europe/european-union-fast-facts
    Supports: Brussels as capital, principal institutions, population estimate