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21 EU countries use the euro. Bulgaria became the 21st on 1 January 2026.
27 − 6 = 21. Take the EU and remove the six that keep their own currency: Czechia, Denmark, Hungary, Poland, Romania and Sweden.
Adopted the euro (as an accounting currency) at its 1 January 1999 launch.
The only country to join between the 1999 launch and the arrival of notes and coins in 2002.
Slovenia in 2007, Cyprus and Malta in 2008, Slovakia in 2009, Estonia in 2011, Latvia in 2014, Lithuania in 2015.
Croatia in 2023 and Bulgaria in 2026.
Can you name them all?
Test yourself21 EU countries use the euro. Bulgaria became the 21st on 1 January 2026.
Austria, Belgium, Finland, France, Germany, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain, Greece, Slovenia, Cyprus, Malta, Slovakia, Estonia, Latvia, Lithuania, Croatia and Bulgaria.
27 − 6 = 21. Take the EU and remove the six that keep their own currency: Czechia, Denmark, Hungary, Poland, Romania and Sweden.
Czechia, Denmark, Hungary, Poland, Romania and Sweden. They are EU members but keep their own currencies.
Each name checked against at least two sources, one of them ECB, on 28 September 2026. Next review by 28 September 2027.
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