The 2004 NCAA Men's Water Polo Championship was the 36th annual NCAA Men's Water Polo Championship to determine the national champion of NCAA men's collegiate water polo.

Tournament matches were played at the Avery Aquatic Center in Stanford, California during December 2004.

UCLA defeated Stanford in the final, 10–9 (in overtime), to win their eighth national title.

The Most Outstanding Player of the tournament was Brett Ormsby from UCLA.

The tournament's leading scorer, with 7 goals, was Endre Rex-Kiss from Loyola Marymount.