The 2005 Men's World Water Polo Championship was the eleventh 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 in a temporary pool on Île Sainte-Hélène from 18 to 30 July 2005, and was incorporated into the 2005 World Aquatics Championships in Montréal, Canada.

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Denis Šefik, Petar Trbojević, Nikola Janović, Vanja Udovičić, Dejan Savić, Danilo Ikodinović, Slobodan Nikić, Vladimir Gojković, Boris Zloković, Aleksandar Šapić, Vladimir Vujasinović, Predrag Jokić, Zdravko Radić Head coach: Petar Porobić

Denis Šefik Petar Trbojević Nikola Janović Vanja Udovičić Dejan Savić Danilo Ikodinović Slobodan Nikić Vladimir Gojković Boris Zloković Aleksandar Šapić Vladimir Vujasinović (c) Predrag Jokić Zdravko Radić Head coachPetar Porobić Zoltán SzécsiDániel VargaNorbert MadarasÁdám Steinmetz Tamás Kásás Attila Vári Gergely Kiss Csaba Kiss Rajmund Fodor Márton Szívós István Gergely Tamás Molnár Péter BirosHead coachDénes Kemény Georgios Reppas Anastasios Schizas Dimitrios Mazis Emmanouil Mylonakis Theodoros Chatzitheodorou Argyris Theodoropoulos Christos Afroudakis Georgios Ntoskas Georgios Afroudakis (c) Stefanos-Petros Santa Antonios Vlontakis Manthos Voulgarakis Nikolaos DeligiannisHead coachSandro Campagna