Current member states[]
| Flag | Country | Capital | Region | First Joined |
|---|---|---|---|---|
 |
Austria | Vienna | Central Europe | 1 January 1995 |
 |
Belgium | Brussels | Western Europe | 23 July 1952 |
 |
Bulgaria | Sofia | Southeastern Europe | 1 January 2007 |
 |
Croatia | Zagreb | Southeastern Europe | 1 July 2013 |
 |
Cyprus | Nicosia | Southern Europe Eastern Europe |
1 May 2004 |
 |
Czech Republic | Prague | Central Europe | 1 May 2004 |
 |
Denmark | Copenhagen | Central Europe | 1 January 1973 |
 |
Estonia | Tallinn | Northern Europe | 1 May 2004 |
 |
Finland | Helsinki | Northern Europe | 1 January 1995 |
 |
France | Paris | Western Europe | 23 July 1952 |
 |
Germany | Berlin | Central Europe | 23 July 1952 |
 |
Greece | Athens | Southern Europe | 1 January 1981 |
 |
Hungary | Budapest | Central Europe | 1 May 2004 |
 |
Ireland | Dublin | Western Europe | 1 January 1973 |
 |
Italy | Rome | Southern Europe | 23 July 1952 |
 |
Latvia | Riga | Northern Europe | 1 May 2004 |
 |
Lithuania | Vilnius | Northern Europe | 1 May 2004 |
 |
Luxembourg | Luxembourg City | Western Europe | 23 July 1952 |
 |
Malta | Valletta | Southern Europe | 1 May 2004 |
 |
Netherlands | Amsterdam | Western Europe | 23 July 1952 |
 |
Poland | Warsaw | Central Europe | 1 May 2004 |
 |
Portugal | Lisbon | Southwestern Europe | 1 January 1986 |
 |
Romania | Bucharest | Southeastern Europe | 1 January 2007 |
 |
Slovakia | Bratislava | Central Europe | 1 May 2004 |
 |
Slovenia | Ljubljana | Central Europe | 1 May 2004 |
 |
Spain | Madrid | Southwestern Europe | 1 January 1986 |
 |
Sweden | Stockholm | Northern Europe | 1 January 1995 |
Former member states[]
| Flag | Country | Capital | Region | First Joined | Left |
|---|---|---|---|---|---|
 |
United Kingdom | London | Western Europe | 1 January 1973 | 31 January 2020 |