| 6th Southeast Asian Peninsular Games | |
| Host City: | Kuala Lumpur, Malaysia |
| Size: | 120px |
| Sports: | 15 |
| Nations: | 7 |
| Opening: | 6 December 1971 |
| Closing: | 13 December 1971 |
| Opened By: | Abdul Halim of Kedah of Malaysia |
| Ceremony Venue: | Stadium Merdeka |
| Next: | Singapore 1973 |
The 1971 Southeast Asian Peninsular Games, officially known as the 6th Southeast Asian Peninsular Games, was a Southeast Asian multi-sport event held in Kuala Lumpur, Malaysia from 6 to 13 December 1971 with 15 sports featured in the games. In this edition of the games, host country Malaysia joined Singapore in pressuring Thailand to let the SEAP Games Federation expand to include the Philippines and Indonesia, but to no avail. Thai officials felt that such expansion would be contrary to the small family affair they had intended the games to be, and would not be in keeping with the close-neighbours spirit the games was supposed to cultivate.[1] This was the second time Malaysia hosted the games and its first time since 1965. The games was opened and closed by Abdul Halim, the King of Malaysia at the Stadium Merdeka. The final medal tally was led by Thailand, followed by host Malaysia and Singapore.
Aquatics included swimming, diving and water polo events. The three sports of aquatics were held in Kuala Lumpur, Malaysia. Aquatics events was held between 12 and 15 December.
| 100 m freestyle |  Tan Thuan Heng | 57.05 | Tan Bun Thay | 57.43 |  Aung Hlain Win | 59.25 | |
| 200 m freestyle | Tan Thuan Heng | 2:07.10 | Tan Bun Thay | 2:08.54 | Eat Kim Heng | 2:09.90 | |
| 400 m freestyle | Tan Thuan Heng | 4:41.82 | Eat Kim Heng | 4:43.40 |  Liew Chun Wei | 4:43.40 | |
| 1500 m freestyle | Liew Chun Wei | 18:43.55 | Tan Bun Thay | 18:58.98 | Mark Chan | 18:59.61 | |
| 100 m backstroke | Van Sarun | 1:04.96 | Alex Chan | 1:06.65 | Chiang Jin Choon | 1:06.72 | |
| 200 m backstroke | Van Sarun | 2:20.34 | Chiang Jin Choon | 2:24.77 | Hem Thon | 2:28.49 | |
| 100 m breaststroke | Phat Sin Onn | 1:10.84 | Ung Meng Tay | 1:12.31 | Khong Kok Sun | 1:14.12 | |
| 200 m breaststroke | Phat Sin Onn | 2:38.04 | Yi Sokhon | 2:43.13 | Alan R. Lelah | 2:44.21 | |
| 100 m butterfly | Roy Chan | 1:02.43 | Nanda Kyaw Zwa | 1:02.63 | Aung Hlain Win | 1:05.07 | |
| 200 m butterfly | Roy Chan | 2:20.33 | Nanda Kyaw Zwa | 2:20.67 | Leong Khong Loong | 2:27.03 | |
| 400 m individual medley | Roy Chan | 5:11.93 | Chiang Jin Choon | 5:21.69 | Poey Sam Mang | 5:24.01 | |
| 4 × 100 m freestyle relay | Singapore | 3:51.13 | Khmer Republic | 3:51.90 | Burma | 3:59.56 | |
| 4 × 200 m freestyle relay | Singapore | 8:46.21 | Burma | 9:01.82 | Malaysia | 9:07.21 | |
| 4 × 100 m medley relay | Khmer Republic | 4:17.87 | Singapore | 4:20.44 | Malaysia | 4:29.95 | |
| 100 m freestyle | Patricia Chan | 1:04.74 |  Panarai Krisnaraja | 1:06.32 | Elaine Sng | 1:06.38 | |
| 200 m freestyle | Patricia Chan | 2:21.62 | Elaine Sng | 2:23.55 | Panarai Krisnaraja | 2:24.59 | |
| 400 m freestyle | Patricia Chan | 5:01.39 | Panarai Krisnaraja | 5:02.77 | Elaine Sng | 5:08.95 | |
| 800 m freestyle | Lim Bee Lian | 10:52.20 | Lim Lay Choo | 11:01.57 | Ng Cheng | 11:17.58 | |
| 100 m backstroke | Ong Mei Lin | 1:14.72 | Lim Bee Lian | 1:16.10 | May Lau | 1:17.15 | |
| 200 m backstroke | May Lau | 2:40.53 | Ong Mei Lin | 2:42.95 | Christina Lam Po Leng | 2:52.58 | |
| 100 m breaststroke | Khong Yiu Lan | 1:26.69 | Rosanna Lim Ai Leng | 1:28.60 | Lim Yit Bin | 1:29.49 | |
| 200 m breaststroke | Khong Yiu Lan | 3:04.04 | Esther Tan | 3:04.84 | Rosanna Lim Ai Leng | 3:08.57 | |
| 100 m butterfly | Tay Chin Joo | 1:11.30 | Karen Chong | 1:17.42 | Jean de Bruyne | 1:22.75 | |
| 200 m butterfly | Tay Chin Joo | 2:41.94 | Karen Chong | 2:47.61 | Jean de Bruyne | 3:00.03 | |
| 200 m individual medley | Ong Mei Lin | 2:46.38 | Tay Chin Joo | 2:47.26 | Lim Bee Lian | 2:47.66 | |
| 4 × 100 m freestyle relay | Singapore | 4:32.63 | Malaysia | 4:51.66 | Not awarded (only 2 competitors) | ||
| 4 × 100 m medley relay | Singapore | 5:00.70 | Malaysia | 5:24.10 | Not awarded (only 2 competitors) | ||
| Men's springboard | Chan Chee Keong | 386.76 | Somjit Ongkasing | 381.84 | Boonchai Tse Loh | 333.60 |
| Men's high diving | Teo Cheng Kiat | 291.96 | Vetasak Parnchsako | 281.97 | You Huat | 273.06 |
| Women's springboard | Nora Tay | 271.77 | Gillian Chew | 260.10 | Tasnee Srivipattana | 252.51 |
| Women's high diving | Tasnee Srivipattana | 245.82 | Vorachit Tungkitsuk | 160.98 | Not awarded (only 2 competitors) | |