The 1999 NCAA Men's Water Polo Championship was the 31st annual NCAA Men's Water Polo Championship to determine the national champion of NCAA men's collegiate water polo. Tournament matches were played at Canyonview Pool in La Jolla, San Diego, California during December 1999. UCLA defeated Stanford in the final, 6–5, to win their sixth national title. The Bruins (22–3) were coached by Guy Baker and Adam Krikorian. The Most Outstanding Player of the tournament was Sean Kern from UCLA. Kern, along with seven other players, comprised the All-Tournament Team.