Judo at the 2009 SEA Games was held at the Chao Anouvong Gymnasium in Vientiane, Laos from 15 to 17 December 2009.
| Nage no kata | Nguyen Thanh Tai Nguyen Ngoc Son | Pongthep Tumrongluk Sangob Sasipongpan | Chansy Viengvilay Syvanevilay Chindavon | |
| 50–55kg | ||||
| 55–60kg | ||||
| 60–66kg | ||||
| 66–73kg | ||||
| 73–81kg | ||||
| 81–90kg | ||||
| 90–100kg | ||||
| 100–120kg |
| Jyu no kata | Chuthathip Bampenboon Pitima Thaweerattanasinp | Nguyen Lan Linh Le Ngoc Van Anh | Cai Ren Jun Ngo Yee Ling | ||
| 40–45kg | |||||
| 45–48kg | |||||
| 48–52kg | |||||
| 52–57kg | |||||
| 57–63kg | |||||
| 63–70kg | |||||
| 70–78kg | |||||
| - | >78kg | ||||