EU News. European Union Information Website (EU and Europe) European Union map. Member countries of the EU (year of entry) The European Union has 28 member countries: On the road to EU membership Candidate countries Potential candidates Bosnia and Herzegovina Kosovo * * This designation is without prejudice to positions on status, and is in line with UNSCR 1244/99 and the ICJ Opinion on the Kosovo declaration of independence Joining the EU Becoming a member of the EU is a complex procedure which does not happen overnight. Map. EUobserver.com.