The eurozone, officially called the euro area, is a monetary union of 19 of the 28 European Union (EU) member states which have adopted the euro (€) as their common currency and sole legal tender. The monetary authority of the eurozone is the Eurosystem. The other nine members of the European Union continue to use their own national currencies, although most of them are obliged to adopt the euro in the future.
The eurozone consists of Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain. Other EU states (except for Denmark and the United Kingdom) are obliged to join once they meet the criteria to do so. No state has left, and there are no provisions to do so or to be expelled. Andorra, Monaco, San Marino, and Vatican City have formal agreements with the EU to use the euro as their official currency and issue their own coins. Kosovo and Montenegro have adopted the euro unilaterally, but these countries do not officially form part of the eurozone and do not have representation in the European Central Bank (ECB) or in the Eurogroup.The ECB, which is governed by a president and a board of the heads of national central banks, sets the monetary policy of the zone. The principal task of the ECB is to keep inflation under control. Though there is no common representation, governance or fiscal policy for the currency union, some co-operation does take place through the Eurogroup, which makes political decisions regarding the eurozone and the euro. The Eurogroup is composed of the finance ministers of eurozone states, but in emergencies, national leaders also form the Eurogroup.
Since the financial crisis of 2007–08, the eurozone has established and used provisions for granting emergency loans to member states in return for enacting economic reforms. The eurozone has also enacted some limited fiscal integration: for example, in peer review of each other's national budgets. The issue is political and in a state of flux in terms of what further provisions will be agreed for eurozone change.