The 2024 World Aquatics Men's U18 Water Polo Championships was the 6th edition of the men's U18 Water Polo Championship. The tournament was played in Buenos Aires, Argentina, from 2 to 9 July 2024. Hungary were the defending champions. Hungary won their third title after beating Serbia in the final. Hosts selection. On 7 December 2023, Argentina was given the hosting rights. Venue. The venue is the Olympic Park Natatorium in Buenos Aires. Format. The 20 teams were divided into two divisions. The top eight teams made Division 1 and the other twelve teams Division 2. Division 1 were split into two groups of four teams while Division 2 was split into four groups of three. The top two teams from each group of Division 1 advanced directly to the quarterfinals, while the other two teams from each group played against one of the group winners from each group in Division 2 in the crossover round. Starting with quarterfinals onward, the regular knock-out system was used. Group stage. Division 1. Group A. <section begin=GA /><section end=GA /> Group B. <section begin=GA /><section end=GA /> Division 2. Group C. <section begin=GA /><section end=GA /> Group D. <section begin=GA /><section end=GA /> Group E. <section begin=GA /><section end=GA /> Group F. <section begin=GA /><section end=GA /> Classification round. Group G. <section begin=GA /><section end=GA /> Group H. <section begin=GA /><section end=GA /> Knockout stage. Crossover 1. The four advancing teams from Division 2 played each in a crossover match. The winners of both ties play a fourth place team while the losers play a team that placed third.