See main article: Aquatics at the 2009 SEA Games.
Swimming at the 2009 SEA Games was held in Vientiane, Laos from 10 to 14 December 2009.[1] In this edition, the sport consisted of 32 events, swum in a long course (50m) pool.
| 50 m freestyle | 22.62 GR | 22.75 | 22.98 | ||||
| 100 m freestyle | 50.16 GR | 50.96 | 51.05 | ||||
| 200 m freestyle | 1:49.22 GR | 1:51.71 | 1:51.76 | ||||
| 400 m freestyle | 3:53.99 GR | 3:56.06 | 3:57.79 | ||||
| 1500 m freestyle | 15:37.75 GR | 15:51.80 | 16:02.21 | ||||
| 100 m backstroke | 56.42 | 56.73 | 56.89 | ||||
| 200 m backstroke | 2:03.27 | 2:04.36 | 2:06.10 | ||||
| 100 m breaststroke | 1:01.60 GR | 1:01.92 | 1:02.60 | ||||
| 200 m breaststroke | 2:13.42 GR | 2:15.25 | 2:17.09 | ||||
| 100 m butterfly | 53.82 GR | 55.53 | 55.65 | ||||
| 200 m butterfly | 2:00.61 | 2:00.90 | 2:01.34 | ||||
| 200 m individual medley | 2:03.68 | 2:04.17 | 2:05.33 | ||||
| 400 m individual medley | 4:27.00 | 4:27.57 | 4:30.78 | ||||
| 4 × 100 m freestyle relay | Russell Ong Joshua Lim Danny Yeo Zach Ong | 3:23.22 GR | 3:24.35 | Triady Fauzi Sidiq Glenn Victor Sutanto Guntur Pratama Brian Howard Ho | 3:25.34 | ||
| 4 × 200 m freestyle relay | Marcus Cheah Joshua Lim Clement Lim Zach Ong | 7:30.73 GR | 7:31.10 | 7:36.89 | |||
| 4 × 100 m medley relay | 3:41.72 GR | 3:44.15 | Ryan Arabejo Miguel Molina James Walsh Charles Walker | 3:46.32 | |||
| 50 m freestyle | 25.82 GR | 25.88 | 26.22 | ||||
| 100 m freestyle | 56.03 GR | 56.33 | 56.60 | ||||
| 200 m freestyle | 2:00.57 GR | 2:01.65 | 2:03.90 | ||||
| 400 m freestyle | 4:10.75 GR | 4:11.24 | 4:17.85 | ||||
| 800 m freestyle | 8:35.41 GR | 8:45.36 | 8:50.50 | ||||
| 100 m backstroke | 1:02.96 GR | 1:03.56 | 1:03.91 | ||||
| 200 m backstroke | 2:17.12 | 2:19.87 | 2:20.98 | ||||
| 100 m breaststroke | 1:09.82 GR, NR | 1:12.54 | 1:13.18 | ||||
| 200 m breaststroke | 2:30.35 GR | 2:34.73 | 2:35.79 | ||||
| 100 m butterfly | 59.24 GR | 1:01.04 | 1:01.79 | ||||
| 200 m butterfly | 2:13.49 GR | 2:14.30 | 2:14.64 | ||||
| 200 m individual medley | 2:14.57 GR | 2:18.98 | 2:20.71 | ||||
| 400 m individual medley | 4:55.07 | 4:56.32 | 4:56.73 | ||||
| 4 × 100 m freestyle relay | Mylene Ong (56.61) Amanda Lim (56.31) Lynette Lim (56.62) Quah Ting Wen (56.19) | 3:45.73 GR | Natthanan Junkrajang (56.22) Jiratida Phinyosophon (56.29) Natsaya Susuk (57.32) Benjaporn Sriphanomtorn (58.26) | 3:48.09 | Leung Chii Lin (58.23) Chui Lai Kwan (57.55) Siow Yi Ting (58.55) Khoo Cai Lin (57.07) | 3:51.40 | |
| 4 × 200 m freestyle relay | Quah Ting Wen (2:02.13) Lynette Lim (2:00.83) Amanda Lim (2:05.26) Mylene Ong (2:03.53) | 8:11.75 GR | Benjaporn Sriphanomtorn (2:04.53) Rutai Santadvatana (2:02.41) Jiratida Phinyosophon (2:05.46) Natthanan Junkrajang (2:05.60) | 8:18.00 | Siow Yi Ting (2:08.99) Lai Wei Li (2:07.87) Hii Siew Siew (2:08.65) Khoo Cai Lin (2:03.61) | 8:29.12 | |
| 4 × 100 m medley relay | Shana Lim (1:03.37) Roanne Ho (1:11.74) Tao Li (59.05) Quah Ting Wen (56.22) | 4:10.38 GR | Chui Lai Kwan (1:04.03) Siow Yi Ting (1:10.40) Marellyn Liew (1:01.86) Khoo Cai Lin (56.89) | 4:13.18 | Chavisa Thaveesupsoonthorn (1:06.73) Phiangkhwan Pawapotako (1:13.82) Natnapa Prommuenwai (1:01.85) Natthanan Junkrajang (57.49) | 4:19.89 | |