| Event: | Swimming |
| Year: | 2023 |
| Venue: | Morodok Tecno National Aquatics Center |
| Location: | Phnom Penh, Cambodia |
| Date: | 6–11 May 2023 |
| Nations: | 11 |
| Previous: | 2021 |
| Next: | 2025 |
The swimming competitions at the 2023 SEA Games took place at Morodok Techo National Aquatics Center in Phnom Penh from 6 to 11 May 2023.[1]
It was one of four aquatic sports at the Games, along with diving, finswimming and Water Polo.[2] A total of 39 events was contested at this edition. The 800m/1500m freestyle for men and women was removed respectively, and was replaced with the introduction of the mixed 4X100m medley relay for the first time in SEA Games history.
Singapore once again cemented their swimming dominance in Southeast Asia by a wide margin. Winning 47 medals, consisting of 22 gold, 16 silver and 9 bronze across the competition, the country achieved their best ever away results. Singapore won over half of the gold medals at 22 out of 39, and the country got their 1,000th gold medal at the SEA Games on the pool. One of their swimmers, Jonathan Tan, also achieved Olympic qualification timing for the 2024 Summer Olympics in Paris – while at the same time breaking the Southeast Asian Games record and national record.[3]
All 11 Nations competed in Swimming.
| 50 m freestyle | 21.95 OQT | 22.50 | 22.84 | ||||
| 100 m freestyle | 48.80 | 48.99 | 49.69 | ||||
| 200 m freestyle | 1:48.91 | 1:49.29 NR | 1:49.31 | ||||
| 400 m freestyle | 3:49.50 | 3:50.39 | 3:53.78 | ||||
| 1500 m freestyle | 15:11.24 | 15:35.21 | 15:40.49 | ||||
| 50 m backstroke | 25.16 | 25.56 NR | 25.61 | ||||
| 100 m backstroke | 55.22 | 55.80 | 55.99 | ||||
| 200 m backstroke | 02:01.29 NR | 02:01.34 NR | 02:01.74 | ||||
| 50 m breaststroke | 27.70 | 27.91 NR | 28.01 | ||||
| 100 m breaststroke | 1:00.97 GR NR | 1:01.22 | 1:02.21 | ||||
| 200 m breaststroke | 2:11.45 GR NR | 2:13.95 | 2:14.30 | ||||
| 50 m butterfly | 23.45 | 23.67 | 23.89 NR | ||||
| 100 m butterfly | 52.04 | 52.60 | 52.91 NR | ||||
| 200 m butterfly | 1:59.44 | 1:59.64 | 2:00.60 | ||||
| 200 m individual medley | 2:01.28 | 2:02.25 NR | 2:02.42 | ||||
| 400 m individual medley | 4:19.12 | 4:21.03 | 4:23.24 NR | ||||
| 4×100 m freestyle relay | Jonathan Tan (48.90) Mikkel Lee Jun Jie (49.73) Darren Chua (50.26) Quah Zheng Wen (48.46) | 3:17.35 | Lim Yin Chuen (50.57) Arvin Chahal (49.64) Khiew Hoe Yean (50.07) Terence Ng (50.33) | 3:20.61 NR | Trần Hưng Nguyên (50.87) Ngô Đình Chuyền (50.32) Hoàng Quý Phước (49.90) Jeremie Loic Nino Lương (50.00) | 3:21.09 NR | |
| 4×200 m freestyle relay | Trần Hưng Nguyên (1:48.59) Nguyễn Hữu Kim Sơn (1:51.25) Nguyễn Huy Hoàng (1:49.38) Hoàng Quý Phước (1:49.29) | 7:18.51 | Jonathan Tan (1:49.66) Glen Lim (1:48.57) Ardi Azman (1:50.79) Darren Chua (1:52.48) | 7:21.50 | Arvin Chahal (1:50.13) Khiew Hoe Yean (1:48.84) Tan Khai Xin (1:52.66) Lim Yin Chuen (1:49.92) | 7:21.55 | |
| 4×100 m medley relay | Quah Zheng Wen (55.31) Nicholas Mahabir (1:00.68) Teong Tzen Wei (52.79) Jonathan Tan (48.67) | 3:37.45 GR, NR | Tonnam Kanteemool (57.04) Thanonchai Janruksa (1:03.20) Navaphat Wongcharoen (53.14) Dulyawat Kaewsriyong (48.37) | 3:41.75 NR | Farrel Armandio Tangkas (56.39) Muhammad Dwiky Raharjo (1:02.18) Joe Aditya Wijaya Kurniawan (53.12) Erick Ahmad Fathoni (50.23) | 3:41.92 | |
| 50 m freestyle | 25.04 GR | 25.16 | 25.32 | ||||
| 100 m freestyle | 55.83 | 56.12 | 56.42 | ||||
| 200 m freestyle | 2:01.76 | 2:02.21 | 2:02.94 | ||||
| 400 m freestyle | 4:15.17 | 4:17.16 | 4:21.79 | ||||
| 800 m freestyle | 8:41.05 | 8:46.88 | 8:56.07 | ||||
| 50 m backstroke | 28.89 GR NR | 28.97 NR | 28.99 | ||||
| 100 m backstroke | 1:01.64 NR | 1:03.68 | 1:03.71 | ||||
| 200 m backstroke | 2:13.20 GR NR | 2:16.19 | 2:17.95 | ||||
| 50 m breaststroke | 31.22 GR NR | 31.62 | 31.94 | ||||
| 100 m breaststroke | 1:07.94 GR | 1:09.59 | 1:10.94 | ||||
| 200 m breaststroke | 2:28.49 GR, NR | 2:32.44 | 2:32.60 | ||||
| 50 m butterfly | 26.65 | 26.66 | 27.02 | ||||
| 100 m butterfly | 59.02 | 59.51 | 01:00.45 | ||||
| 200 m butterfly | 2:10.63 | 2:11.56 NR | 2:14.37 | ||||
| 200 m individual medley | 2:14.49 NR | 2:16.16 | 2:16.39 | ||||
| 400 m individual medley | 04:47.25 NR | 04:49.33 | 04:52.08 | ||||
| 4×100 m freestyle relay | Quah Ting Wen (55.85) Nur Marina Chan (56.19) Quah Jing Wen (56.16) Amanda Lim (56.09) | 3:44.29 | 3:47.96 | Jenjira Srisaard Kamonchanok Kwanmuang Kornkarnjana Sapianchai Mia Millar | 3:50.01 | ||
| 4×200 m freestyle relay | Gan Ching Hwee (2:01.81) Ashley Lim Yi Xuan (2:02.89) Chan Zi Yi (2:03.93) Quah Ting Wen (2:04.17) | 8:12.80 | Kamonchanok Kwanmuang Napatsawan Jaritkla Jinjutha Pholjamjumrus Kornkarnjana Sapianchai | 8:17.95 | Chloe Isleta Teia Salvino Jasmine Alkhaldi Xiandi Chua | 8:19.94 | |
| 4×100 m medley relay | Faith Khoo (1:04.23) Letitia Sim (1:07.32) Quah Jing Wen (59.10) Quah Ting Wen (56.32) | 4:06.97 GR, NR | Teia Salvino Thanya Angelyn Cacho Jasmine Alkhaldi Miranda Renner | 4:11.81 | 4:14.06 | ||
| 4×100 m medley relay | Quah Zheng Wen (55.72) Nicholas Mahabir (1:00.80) Quah Jing Wen (58.88) Quah Ting Wen (56.32) | 3:51.72 GR, NR | 3:57.01 | Saovanee Boonamphai Dulyawat Kaewsriyong Navaphat Wongcharoen Kamonchanok Kwanmuang | 3:58.18 |