Which countries use euros (EUR)? 19 of the 28 member states of the European Union use euros
You'll need euros if you are visiting any of these coutnries:
Northern Europe: Estonia, Finland, Latvia, and Lithuania
Central Europe: Austria, Belgium, France, Germany, Luxembourg, Netherlands, Republic of Ireland, Slovakia, and Slovenia
Southern Europe: Cyprus, Greece, Italy, Malta, Portugal, and Spain
You might be surprised by how many European countries don't use euros:
Albania, Armenia, Belarus, Bosnia-Herzegovina, Bulgaria, Croatia, Czech Republic, Denmark, Georgia, Hungary, Iceland, Kazakhstan, Liechtenstein, Lithuania, Macedonia, Moldova, Norway, Poland, Romania, Russia, Serbia, Sweden, Switzerland, Turkey and Ukraine.