| Event: | Women's 800-metre freestyle |
| Competition: | 2001 FINA World Championships |
| Dates: | 22 July 2001 (heats) 23 July 2001 (final) |
| Competitors: | 24 |
| Win Value: | 8 minutes 24.66 seconds |
| Gold: | Hannah Stockbauer |
| Goldnoc: | GER |
| Silver: | Diana Munz |
| Silvernoc: | USA |
| Bronze: | Kaitlin Sandeno |
| Bronzenoc: | USA |
| Prev: | 1998 |
| Next: | 2003 |
See main article: Swimming at the 2001 World Aquatics Championships.
The women's 800-metre freestyle event at the 2001 World Aquatic Championships took place 23 July. The heats[1] took place 22 July, and the final[2] was held on 23 July.
Prior to the competition, the existing world and championship records were as follows:
| World record | 8:16.22 | Tokyo, Japan | align=right | 20 August 1989 | ||
| Championship record | 8:24.05 | Perth, Australia | align=right | 12 January 1991 |
| Rank | Swimmer | Nation | Time | Notes | |
|---|---|---|---|---|---|
| 1 | 8:31.79 | Q | |||
| 2 | 8:33.09 | Q | |||
| 3 | 8:35.51 | Q | |||
| 4 | 8:36.87 | Q | |||
| 5 | 8:37.21 | Q | |||
| 6 | 8:37.27 | Q | |||
| 7 | 8:37.52 | Q | |||
| 8 | 8:40.33 | Q | |||
| 9 | 8:40.55 | ||||
| 10 | 8:41.35 | ||||
| 11 | 8:43.60 | ||||
| 12 | 8:43.79 | ||||
| 13 | 8:43.85 | ||||
| 14 | 8:44.78 | ||||
| 15 | 8:44.95 | ||||
| 16 | 8:47.54 | ||||
| 17 | 8:47.61 | ||||
| 18 | 8:48.62 | ||||
| 19 | 8:50.47 | ||||
| 20 | 8:54.00 | ||||
| 21 | 8:54.49 | ||||
| 22 | 9:01.22 | ||||
| 23 | 9:01.74 | ||||
| 24 | 9:28.82 |
| Rank | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|
| 8:24.66 | |||||
| 8:28.84 | |||||
| 8:31.45 | |||||
| 4 | 8:31.66 | ||||
| 5 | 8:33.79 | ||||
| 6 | 8:36.67 | ||||
| 7 | 8:39.32 | ||||
| 8 | 8:45.05 |
Key: WR = World record