The Women's 800 metre freestyle event at the 2013 SEA Games took place on 14 December 2013 at Wunna Theikdi Aquatics Centre.
There were 12 competitors from 6 countries who took part in this event. 8 swimmers with the fast qualifying time were in the fast heat, the others were in the slow heat.[1] The final ranking was arranged by the times from both heats.
All times are Myanmar Standard Time
| width=220 | Date | width=50 | Time | width=100 | Event |
|---|---|---|---|---|---|
| Thursday, 14 December 2013 | 09:23 | Final 1 | |||
| ? | Final 2 |
| width=40 | Rank | width=40 | Heat | width=40 | Lane | width=250 | Athlete | width=80 | Time | width=50 | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 4 | 8:49.51 | |||||||||
| 2 | 3 | 8:49.61 | |||||||||
| 2 | 7 | 8:52.77 | |||||||||
| 4 | 2 | 5 | 8:59.39 | ||||||||
| 5 | 2 | 1 | 9:00.20 | ||||||||
| 6 | 2 | 6 | 9:06.12 | ||||||||
| 7 | 2 | 2 | 9:08.11 | ||||||||
| 8 | 1 | 5 | 9:17.60 | ||||||||
| 9 | 2 | 8 | 9:19.01 | ||||||||
| 10 | 1 | 4 | 9:20.73 | ||||||||
| 11 | 1 | 3 | 10:00.81 | ||||||||
| 12 | 1 | 6 | 10:30.95 |