The water polo events at the 2001 World Aquatics Championships were held from 18 to 29 July 2001, in Fukuoka, Japan.[1]
| Men | | Aleksandar Ćirić Danilo Ikodinović Viktor Jelenić Branko Peković Dejan Savić Aleksandar Šapić Denis Šefik Aleksandar Šoštar Petar Trbojević Veljko Uskoković Vladimir Vujasinović Nenad Vukanić Predrag Zimonjić Head 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 Rekechinski Head coach: Aleksandr Kabanov | |
| Women | | Katalin Dancsa, Rita Drávucz, Anikó Pelle, Ágnes Primász, Katalin Rédei, Edit Sipos, Ildikó Sós, Mercédesz Stieber, Brigitta Szép, Krisztina Szremkó, Zsuzsanna Tiba, Ágnes Valkai, Erzsébet Valkai Head coach: Tamás Faragó. | |