The 2014 contest took place in Prague, Czech Republic, the 2015 contest was held in Tokyo, Japan, and in 2016, it was held in Cleveland, Ohio in the United States. The cycle of where the contest would be held would repeat between Europe, Asia, and the United States. In this way, the World Yo-Yo Contest could truly be considered an international competition.
In November 2015, it was announced on YoYoNews that the 2017 World Yo-Yo Contest would be held and hosted in Reykjavik, Iceland. The 2018 Worlds will be held in Shanghai, China.
Source: (Sploid via The Awesomer, Wikipedia)