Expo 2012 was an International Exposition recognized by the Bureau International des Expositions (BIE) held in Yeosu, South Korea which opened on May 12, 2012 and ran until August 12, 2012. The theme of the Expo was "The Living Ocean and Coast" with subthemes of "Preservation and Sustainable Development of the Ocean and Coast", "New Resources Technology", and "Creative Marine Activities". There were 105 participating countries, international organizations, and 8,203,956 visitors.

A world's fair, also known as a universal exhibition or an expo, is a large global exhibition designed to showcase the achievements of nations. These exhibitions vary in character and are held in different parts of the world at a specific site for a period of time, typically between three and six months.