List of world expositions

List of world expositions is an annotated list of every world exposition sanctioned by the Bureau International des Expositions (BIE), including those recognised retrospectively as they took place (long) before BIE came into existence.

The designation "World Exposition" or "Expo" refers to a class of the largest, general scope exhibitions of 3 to 6 months' duration.

This list does not include BIE recognized International Horticultural Exhibitions. For other major international exhibitions, in addition to those endorsed by the BIE, see the comprehensive list of world's fairs.

Category

World Expo BIE-International Registered exhibitions that take place every 5 years and last up to 6 months. All exhibitions in this category, which took place before 1928, were subsequently recognized by the BIE.
Specialised Expo BIE-International Recognised exhibitions that take place between 2 World Expos and last up to 3 months.