Deca Sports (Deca Sporta in Japan, Sports Island in Europe) is a sports video game for the Wii developed by Hudson Soft. It is a collection of ten different sports simulations controlled with the Wii Remote.

The game was released in Japan on March 19, 2008, and was released in the rest of the world later in the year. In late 2007 Hudson conducted a poll to determine a new title for the Western release. The game features sponsorship by Deca Sports does not feature the use of Miis. Instead, eight different teams (Average Joes, Speed Strikers, Hard Hitters, Crusaders, Boost Force, Mad Maidens, Team Thunder and Disco Knights) are available for selection in the various sporting events. Each team is made up of small, medium and large players of both genders. Small athletes are nimble, but are not too strong, while large athletes are powerful, but are slower and a little harder to control. Medium-size players provide a compromise between speed and strength. Team member size becomes more important during Deca League, where playing one team member for too long will result in fatigue and decreased performance.