Swimming at the 2009 Southeast Asian Games – Women's 800 metre freestyle
# Swimming at the 2009 Southeast Asian Games – Women's 800 metre freestyle

The Women's 800 Freestyle swimming event at the 25th SEA Games was held on December 12, 2009.

## Results

The women's 800 Free at was swum as a timed final event, meaning that each swimmer only swam the race once and all times were aggregated together for final placing.

| Place | Heat/Lane | Swimmer | Nation | Time | Notes |
| - | - | - | - | - | - |
| 1 | H2 L4 | Lynette Lim | Singapore | 8:35.41 | GR |
| 2 | H2 L5 | Cai Lin Khoo | Malaysia | 8:45.36 | |
| 3 | H2 L6 | Rutai Santadvatana | Thailand | 8:50.50 | |
| 4 | H2 L3 | Erica Rotten | Philippines | 8:54.96 | |
| 5 | H1 L4 | Hui Yu Koh | Malaysia | 9:04.67 | |
| 6 | H2 L2 | Wei Li Lai | Thailand | 9:09.16 | |
| 7 | H2 L7 | Patarawadee K | Singapore | 9:08.58 | |
| 8 | H1 L5 | Raina Saumi | Indonesia | 9:15.65 | |
| 9 | H1 L3 | Jasmine Ong | Philippines | 9:50.63 | |
