Expo mascots have been used at Bureau International des Expositions approved World's fairs since the 1984 Louisiana World Exposition. Seymore D. Fair, was the official mascot of the 1984 Louisiana World Exposition as well as the first mascot at any world's fair, and was followed by many more whimsical character mascots.
- Seymore D. Fair, was the official mascot for the 1984 Louisiana World Exposition was a 7'6" tall white pelican, was the official mascot of the 1984 Louisiana World Exposition as well as the first mascot at any world's fair. Seymore was seen as a way to highlight the fresh water theme and appeal to children.
- Cosmo Hoshimaru, mascot for the 1985 Tsukuba Specialized exposition
- Expo Ernie, mascot for the 1986 Vancouver Specialized exposition
- Expo Oz, mascot for the 1988 Brisbane World Expo
- Curro, mascot for the 1992 Seville World exposition
- Kumdori, mascot for the 1993 Taejon Specialized exposition
- Gil, mascot for the 1998 Lisbon Specialized exposition
- Twipsy, mascot for the 2000 Hannover World Expo
- Kiccoro & Morizo, mascots for the 2005 Aichi Specialized exposition
- Fluvi, mascot for the 2008 Zaragoza Specialized exposition
- Haibao, mascot for the 2010 Shanghai World Expo
- Yeony & Suny, mascot for the 2012 Yeosu Specialized exposition
- Foody, mascot for the 2015 Milan World Expo
- Saule, Kuat & Moldir for the Specialized Expo 2017 in Astana