[4] On 10 September 2024, FIVB announced that Indonesia was selected as the host for the 2024 Girls' U21 World Championship.
The slot allocation per confederation was set as follows:[4] In June 2023 during a three-day meeting in Punta Cana, Dominican Republic, the FIVB Board of Administration approved the proposal made by its Volleyball Council to increase the number of participating teams to 24 in its Age Group World Championships (U19 and U21 in both genders).
The new competition formula was in line with the one adopted for the 2023 FIVB Volleyball Boys' U19 World Championship, which was also contested by 24 teams.
[9] The 24 participating teams will be split into four single round-robin pools of six with the host nations and the reigning world champions receiving the highest seeds.
The rest of the qualified teams are seeded in a serpentine system based on their positions in the respective FIVB World Rankings.