Water polo at the 2015 SEA Games was held from 10 to 16 June 2015 at the OCBC Aquatic Centre in Kallang, Singapore.

[1] 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.

A total of 130 athletes from five nations competed in water polo at the 2015 Southeast Asian Games: The draw ceremony for the team sports was held on 15 April 2015 at Singapore.

Both men's and women's competitions was played in the event's single round robin format.

[2] The following was the competition schedule for the water polo competitions: *   Host nation (Singapore)