Austria joined the European Union in 1995 and was one of the first countries to adopt the euro on 1 January 1999.
Belgium is a founding member of the European Union and one of the first wave countries to adopt the euro on 1 January 1999.
Bulgaria joined the European Union on 1 January 2007 and has been in ERM-II since 10 July 2020.
Croatia joined the European Union in 2013 and adopted the euro on 1 January 2023.
Cyprus joined the European Union in 2004 and adopted the euro on 1 January 2008.
Czechia joined the European Union in 2004 and is currently preparing to adopt the euro.
Denmark joined the European Union in 1973. It has negotiated an opt-out from the euro and is thus not obliged to introduce it.
Estonia joined the European Union in 2004 and adopted the euro on 1 January 2011.
Finland joined the European Union in 1995 and was one of the first countries to adopt the euro on 1 January 1999.
France is a founding member of the European Union and one of the first countries to adopt the euro on 1 January 1999.
Germany is a founding member of the European Union and one of the first countries to adopt the euro on 1 January 1999.
Greece joined the European Union in 1981, and adopted the euro in 2001 in time to be among the first wave of countries to launch euro banknotes and coins on 1 January 2002.
Hungary joined the European Union in 2004 and is currently preparing to adopt the euro.
Ireland joined the European Union in 1973 and was one of the first countries to adopt the euro on 1 January 1999.
Italy is a founding member of the European Union and one of the first countries to adopt the euro on 1 January 1999.
Latvia joined the European Union in 2004 and adopted the euro on 1 January 2014.
Lithuania joined the European Union in 2004 and adopted the euro on 1 January 2015.
Luxembourg is a founding member of the European Union and one of the first countries to adopt the euro on 1 January 1999.
Malta joined the European Union in 2004 and adopted the euro on 1 January 2008.
The Netherlands is a founding member of the European Union and one of the first countries to adopt the euro on 1 January 1999.
Poland joined the European Union in 2004 and is currently preparing to adopt the euro.
Portugal joined the European Union in 1986 and was one of the first countries to adopt the euro on 1 January 1999.
Romania joined the European Union on 1 January 2007 and has committed to adopt the euro once it fulfils the necessary conditions.
Slovakia joined the European Union in 2004 and adopted the euro on 1 January 2009.
Slovenia joined the European Union in 2004 and, on 1 January 2007, became the first of the new EU countries to adopt the euro.
Spain joined the European Union in 1986 and was among the first countries to adopt the euro on 1 January 1999.
Sweden joined the European Union in 1995 and has not yet adopted the euro, but in accordance with the Treaty it will do so once it meets the necessary conditions.