The 1998 Men's World Water Polo Championship was the eighth 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 7 to 18 January 1998 in the Challenge Stadium, and was incorporated into the 1998 World Aquatics Championships in Perth, Western Australia.

Preliminary round results apply.

Daniel Ballart, Manuel Estiarte, Pedro García, Salvador Gómez, Miguel González, Gustavo Marcos, Rubén Michavila, Iván Moro, Sergi Pedrerol, Iván Pérez, Jesús Rollán, Jordi Sans, Carlos Sanz Head coach: Juan Jané

Zoltán Kovacs Zoltán Kósz Tibor Benedek Gergely Kiss Frank Toth Rajmund Fodor Zsolt Varga Barnabás Steinmetz Balázs Vincze Tamás Molnár Tamás Kásás Attila Vári Tamás MarczHead coach: Dénes Kemény Aleksandar ĆirićDanilo IkodinovićDragan JovanovićNikola KuljačaAleksandar NikolićDušan PopovićDejan SavićAleksandar ŠapićPetar TrbojevićVeljko UskokovićŽeljko VičevićVladimir VujasinovićNenad VukanićHead coach: Nikola Stamenić