Expo 2015 participating Countries

Expo 2015 participant Countries are listed in the following table and amount to 137. Countries could participate in Expo 2015 either with a self-built pavilion or within a Cluster, that are joint pavilions built and made available by the organizers, dedicated to small or developing countries.

The first Country officially confirming its participation to the event was Switzerland on February 3rd, 2011 though China representatives already signed a participation protocol as a mutual exchange with Shanghai Expo 2010.

A Country's participation is usually financed by public funds but this is not always the case. For example, because of a federal law, the USA cannot participate to events like Expos with public funds; therefore a consortium of private investors allowed the official participation of the Government of the US to Expo 2015. Another peculiar case is India, that informally participated to Milan's World's fair through KIP International School (having a self-built pavilion) and within the Rice Cluster with the Basmati pavilion, thanks to private investors.

Withdrawals
A few countries initially adhered to the exposition but eventually did not confirm their participation:
 * Saudi Arabia
 * Bulgaria - it gave up due to the delays collected, also caused by a frequent change of the Bulgarian government
 * Croatia - it withdrew because of the high costs involved; all the funds were used for the reconstructions after the floods occurred in May 2014
 * Latvia - it withdrew because of the high costs involved
 * Libya
 * Ukraine - it gave up its participation cause of the Crimea crisis in 2014

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