The 2001 Men's World Water Polo Championship was the ninth edition of the men's water polo tournament at the World Aquatics Championships, organised by the world governing body in aquatics, the FINA.

The tournament was held from 19 to 29 July 2001, and was incorporated into the 2001 World Aquatics Championships in Fukuoka, Japan.

Preliminary round results apply.

Angel Andreo, Daniel Ballart, Salvador Gomez, Gabriel Hernandez, Gustavo Marcos, Guillermo Molina, Daniel Moro, Ivan Moro, Sergi Pedrerol, Ivan Perez, Jesus Rollan, Javier Sánchez, Carlos Sanz Head coach: Juan Jané

Aleksandar Ćirić Danilo Ikodinović Viktor Jelenić Branko Peković Dejan Savić Aleksandar Šapić Denis Šefik Aleksandar Šoštar Petar Trbojević Veljko Uskoković Vladimir Vujasinović (c) Nenad Vukanić Predrag ZimonjićHead coach: Nenad Manojlović Ilya Smirnov Yuri Yatsev Aleksandr Fyodorov Nikolay Kozlov Roman Balashov Aleksandr Yeryshov Revaz Chomakhidze Alexey Panfili Dmitry Gorshkov (c) Marat Zakirov Sergey Garbuzov Irek Zinnurov Andrei RekechinskiHead coach: Aleksandr Kabanov