The aquatics events at the 2005 Southeast Asian Games included swimming, diving and water polo disciplines.

*   Host nation (Philippines)The diving events at the 2005 Southeast Asian Games took place in the Trace College Aquatic Centre in 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.