The Eurozone ( also called Euro area or Euroland ) is the set of countries in the European Union which have adopted the Euro ( â ) currency . The European Central Bank is responsible for managing the supply of money within the eurozone and political decisions are taken by the `` euro group '' , which is a meeting of the politicians from each euro country in charge of that country 's economy . Some co-operation does however take place through the euro group , which makes political decisions regarding the eurozone and the euro .