Note: Single-source report; awaiting corroboration.
The lineup for the 2026 World Aquatics Men's U18 Water Polo Championships features a diverse international field. Europe will have nine teams competing, including reigning world champion Hungary, along with Croatia, Montenegro, Serbia, Spain, Greece, Italy, Portugal, and Turkiye.
From Asia, China, Hong Kong, and Singapore will participate. Africa is represented solely by South Africa.
The Americas will see the United States, Colombia, Brazil, Argentina, and Canada compete. Oceania’s representatives are New Zealand and Australia.
This global participation highlights the widespread engagement with men's U18 water polo ahead of the 2026 championships, according to official World Aquatics information.