Aquatics at the 2005 SEA Games
The aquatics events at the 2005 Southeast Asian Games included swimming, diving and water polo disciplines. All events were held in Trace College Aquatics Centre, Los Baños, Laguna, Philippines
Swimming
The Swimming competition was held 29 November to 4 December, and featured 32 events.Medalists
;Men;Women
Diving
The diving events at the 2005 Southeast Asian Games took place in the Trace College Aquatic Centre in Los Baños, Laguna. It was held from November 27 to 30. Eight gold medals were contested in four disciplines.Medalists
;Men;Women
Water polo
The Water polo events were held from 21 November to 26 November 2005 at the Trace College, Los Baños, Laguna. Six teams were in competition in a round-robin format, with defending champion Singapore looking towards retaining its crown won 20 times consecutively since 1965. The team's win over Thailand on the fourth day of the tournament effectively meant it has worn the gold medal regardless of the score in its final match against Vietnam. The Philippines team managed to take the silver medal, equaling its best showing in the 1993 Southeast Asian Games.Round-robin
Standings''Results''
Games Records
- Men's 50 m Freestyle: Thailand's Arwut Chinnapasaen, 22.98
- Men's 4x200 m Freestyle Relay: Singapore's Chay Jung Jun Mark, Cheah Mingzhe Marcus, Tan Lee Yu Gary, Tay Zhi Rong Bryan, 7:35.85
- Women's 50 m Freestyle: Singapore's Joscelin Yeo, 26.13
- Women's 100 m Backstroke: Singapore's Tao Li, 1:03.83
- Women's 100 m Butterfly: Singapore's Joscelin Yeo, 59.91
- Women's 200 m Butterfly: Singapore's Tao Li, 2:14.11
- Women's 4x100 m Medley Relay: Singapore's Ho Shu Yong, Tao Li, Nicolette Teo, Joscelin Yeo, 4:14.49