List the 19 EU member countries using Euro currency;
One of the Eurozone countries is geographically outside Europe, so that the map does not highlight her.
Thanks to comment from Celloninja it is good to mention that Andorra, Monaco, Liechtenstein, San Marino, and Vatican also use euro currency, though they are not member states of the EU.
Check also my quizzes of "EU Countries Outside the Eurozone";