According to the official Pokémon Go page on Facebook, Pokémon GO is now available in 26 new European countries.
With the huge popularity of the app in the US, The Pokémon Company, Niantic and Nintendo have had the attention of million of users in many other countries. This time, the app has reached users of iOS and Android devices to: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Greece, Greenland, Hungary, Iceland, Ireland, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Romania, Slovakia, Slovenia, Sweden, and Switzerland.
While the app is now available in the US, Australia, New Zealand, and many countries in Europe, many fans in Japan and Latin America are still waiting for the official arrival of Pokémon GO, though some fans who just can’t wait are installing the Android APK version.
[Update July 17, 2016]: Pokémon GO is now available in Canada.
[Source]: Pokémon GO (Facebook): Pokémon GO is available in twenty-six new countries; Pokémon GO is now available in Canada!.