使用歐元的歐盟國家-19：A total of 19 of the 27 members of the European Union have adopted
the euro as their official and sole currency, creating the 'eurozone' or
'euro area'. These countries are:

• Austria, Belgium, Cyprus,
  Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia,
  Lithuania, Luxembourg, Malta, the Netherlands, Portugal, Slovakia,
  Slovenia and Spain.

非歐盟國家卻使用歐元-6：In addition to these members of the eurozone, the following non-EU
members have also adopted the euro as their official currency:

• Andorra, Kosovo, Monaco, Montenegro, San Marino and Vatican City

計劃未來使用歐元的國家-3：

Bulgaria, Croatia and Romania

無立刻計劃使用歐元的歐盟國家-5：

Czech Republic, Denmark，Hungary, Poland，Sweden