The men's water polo tournament at the 2019 Southeast Asian Games was held at the New Clark City Aquatics Center, Tarlac, Philippines from 26 November to 1 December 2019. The competition was held in a round-robin format, where the top 3 teams at the end of the competition will win the gold, silver, and bronze medal respectively. Indonesia won their very first gold medal in the competition by topping the round-robin eliminations, ending the defending champions Singapore's 54-year domination of the sport since 1965.