In January 2026, Bulgaria became the 21st member of the eurozone. Which of the following European Union countries have NOT adopted the euro by January 2026?
Poland, Czech Republic, Hungary
Bulgaria adopted the euro on 1 January 2026, raising the eurozone to 21 of the 27 EU member states. The six EU members still outside the euro are Poland, the Czech Republic, Hungary, Romania, Sweden and Denmark (Denmark has a legal opt-out).
Poland (złoty), the Czech Republic (koruna) and Hungary (forint) continue to use their own currencies, so this group has not adopted the euro.
All the countries in the other groups already use the euro: Austria and Belgium (1999), Slovenia (2007), Slovakia (2009), Estonia (2011), Latvia (2014), Lithuania (2015) and Croatia (2023).
Hence, the answer is Poland, Czech Republic, Hungary.
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