| Event: | Swimming |
| Games: | 2002 Asian Games |
| Venue: | Sajik Swimming Pool |
| Dates: | 30 September – 5 October 2002 |
| Competitors: | 220 |
| Nations: | 28 |
| Prev: | 1998 |
| Next: | 2006 |
Swimming was contested from September 30 to October 5 at the 2002 Asian Games in Busan, South Korea.
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| 50 m freestyle | 22.86 | Shared gold | 23.14 | ||||
| 100 m freestyle | 50.76 | 50.83 | 51.22 | ||||
| 200 m freestyle | 1:49.29 | 1:49.36 | 1:50.66 | ||||
| 400 m freestyle | 3:50.41 | 3:54.57 | 3:56.10 | ||||
| 1500 m freestyle | 15:10.99 | 15:12.32 | 15:22.38 | ||||
| 100 m backstroke | 55.17 | 55.18 | 55.32 | ||||
| 200 m backstroke | 2:00.40 | 2:00.76 | 2:01.22 | ||||
| 100 m breaststroke | 1:00.45 | 1:03.04 | 1:03.22 | ||||
| 200 m breaststroke | 2:09.97 | 2:13.60 | 2:15.81 | ||||
| 100 m butterfly | 52.59 | 53.22 | 53.56 | ||||
| 200 m butterfly | 1:56.63 | 1:57.18 | 1:57.26 | ||||
| 200 m individual medley | 2:00.53 | 2:02.07 | 2:03.34 | ||||
| 400 m individual medley | 4:15.38 | 4:16.63 | 4:17.03 | ||||
| 4 × 100 m freestyle relay | Huang Shaohua Jin Hao Chen Zuo Liu Yu | 3:21.07 | Naoki Nagura Yoshihiro Okumura Daisuke Hosokawa Hiroaki Akebe | 3:23.43 | Sung Min Koh Yun-ho Kim Min-suk Han Kyu-chul | 3:23.58 | |
| 4 × 200 m freestyle relay | Shunichi Fujita Yoshihiro Okumura Daisuke Hosokawa Yosuke Ichikawa | 7:20.59 | Wu Peng Chen Zuo Yu Cheng Liu Yu | 7:25.36 | Choi Won-il Koh Yun-ho Kim Bang-hyun Han Kyu-chul | 7:29.36 | |
| 4 × 100 m medley relay | Atsushi Nishikori Kosuke Kitajima Takashi Yamamoto Yoshihiro Okumura | 3:37.45 | Ouyang Kunpeng Zeng Qiliang Jin Hao Chen Zuo | 3:42.07 | Sung Min Son Sung-uk Yoo Jung-nam Koh Yun-ho | 3:46.44 |
| 50 m freestyle | 25.42 | 25.63 | 25.76 | ||||
| 100 m freestyle | 54.92 | 55.51 | Shared silver | ||||
| 200 m freestyle | 1:58.43 | 1:59.42 | 2:00.52 | ||||
| 400 m freestyle | 4:07.23 | 4:12.24 | 4:15.82 | ||||
| 800 m freestyle | 8:25.36 | 8:28.77 | 8:44.80 | ||||
| 100 m backstroke | 1:01.82 | 1:02.16 | 1:02.35 | ||||
| 200 m backstroke | 2:11.44 | 2:12.38 | 2:13.25 | ||||
| 100 m breaststroke | 1:06.84 | 1:08.35 | 1:10.11 | ||||
| 200 m breaststroke | 2:24.01 | 2:24.67 | 2:29.82 | ||||
| 100 m butterfly | 58.88 | 1:00.18 | 1:01.06 | ||||
| 200 m butterfly | 2:08.99 | 2:11.57 | 2:12.07 | ||||
| 200 m individual medley | 2:13.94 | 2:14.67 | 2:16.37 | ||||
| 400 m individual medley | 4:40.37 | 4:43.49 | 4:47.09 | ||||
| 4 × 100 m freestyle relay | Yang Yu Zhu Yingwen Ju Jielei Xu Yanwei | 3:40.95 | Maki Mita Tomoko Nagai Norie Urabe Sachiko Yamada | 3:44.59 | Ryu Yoon-ji Kim Hyun-joo Shim Min-ji Sun So-eun | 3:44.81 | |
| 4 × 200 m freestyle relay | Zhu Yingwen Tang Jingzhi Xu Yanwei Yang Yu | 7:58.46 | Maki Mita Tomoko Nagai Sachiko Yamada Norie Urabe | 8:02.76 | Ha Eun-ju Kim Ye-sul Kim Hyun-joo Shim Min-ji | 8:19.62 | |
| 4 × 100 m medley relay | Zhan Shu Luo Xuejuan Zhou Yafei Xu Yanwei | 4:00.21 | Noriko Inada Fumiko Kawanabe Yuko Nakanishi Tomoko Nagai | 4:05.75 | Shim Min-ji Ku Hyo-jin Park Kyung-hwa Sun So-eun | 4:13.41 |
A total of 220 athletes from 28 nations competed in swimming at the 2002 Asian Games: