The FIVB Volleyball World League was an annual international men's volleyball competition. Created in 1990, it was the longest and richest of all the international events organized by the Fédération Internationale de Volleyball (FIVB). The women's version of the competition was called FIVB Volleyball World Grand Prix. This event should not be confused with the other international volleyball competitions, the World Championship, the World Cup and the World Grand Champions Cup.

The 2015 FIVB Volleyball World League was the 26th edition of the annual men's international volleyball tournament, played from 16 May to 19 July 2015. The tournament featured a record 32 participating countries from 5 confederations. The teams were divided into 3 groups and 8 pools. The Group 1 Final Round which served as the volleyball test event of the 2016 Summer Olympics was held in Rio de Janeiro, Brazil.