27.
The 27 belonging to the European Union are: Austria, Belgium, Bulgaria, Cyprus, The Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italia, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden and The UK.
There are 27 EU countries.
They joined the EU in 2004 on the 1st of may. Since then they have been added to the list of EU countries.
No Eastern European countries were members of the European Union in 1993. The EU did not expand to the east until 2004 when nine Eastern European countries (with one Western European nation) joined the EU.
The countries that joined the EU in 2004 were: Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia and Slovenia
No countries joined the EU in 2008. 10 countries joined in 2004. See the related question below.
In 2005, there were 25 countries in the EU.
The EU is an organisation, not a nation. As of 2015, it has 28 independent countries that are members of it.
It joined along with 9 other countries in May 2004.
If you mean how many countries in the EU use the EU currency, the Euro, the answer is 17.
10 countries joined the European Union in 2004, almost doubling the number of states in the EU the previous year (there were 15 in 2003). The countries were: Slovenia Slovakia Poland Malta Latvia Lithuania Hungary Estonia Czech Republic Cyprus
Actually, it was in 2004. The following countries joined the EU.CyprusCzech RepublicHungaryEstoniaLatviaLithuaniaMaltaPolandSloveniaSlovakia
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