FIVB Volleyball Men's U21 World Championship
| Upcoming season or competition: 2025 FIVB Volleyball Men's U21 World Championship | |
| Sport | Volleyball |
|---|---|
| Founded | 1977 |
| First season | 1977 |
| No. of teams | 24 |
| Continent | International (FIVB) |
| Most recent champion(s) | Iran (2nd title) |
| Most titles | Russia (6 titles) |
The FIVB Volleyball Men's U21 World Championship, called the FIVB Volleyball Men's Junior World Championship between 2007 and 2011, is the world championship of volleyball for male players under the age of 21 organized by Fédération Internationale de Volleyball (FIVB).
The first edition was staged in 1977 in Brazil and tournaments have been played every four years for the first three editions and every two years since then. The most recent tournament was hosted by Bahrain in the city of Manama and won by Iran.
In July 2023, FIVB announced the increase of teams from 16 to 24 and that the tournament would be staged in even-numbered years starting in 2026 in combination with the U17 World Championships, to ensure progressive participation of athletes in their respective age group categories. Subsequently, FIVB decided to discard the 2026 edition, so that after 2025 the next tournament would be in 2028 in order not to congest the calendar of the age group championships.
Russia is the most successful nation in the tournament's history, with six titles and three runners-up. Brazil is the second most successful with four titles and six runners-up.
A corresponding tournament for female players is the FIVB Volleyball Women's U21 World Championship.