| 2009 FINA World Championships | ||
|---|---|---|
| Diving | ||
| Individual | ||
| 1 m | men | women |
| 3 m | men | women |
| 10 m | men | women |
| Synchronised | ||
| 3 m | men | women |
| 10 m | men | women |
| Open water swimming | ||
| 5 km | men | women |
| 10 km | men | women |
| 25 km | men | women |
| Swimming | ||
| Freestyle | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| 400 m | men | women |
| 800 m | men | women |
| 1500 m | men | women |
| Backstroke | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| Breaststroke | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| Butterfly | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| Individual medley | ||
| 200 m | men | women |
| 400 m | men | women |
| Freestyle relay | ||
| 4×100 m | men | women |
| 4×200 m | men | women |
| Medley relay | ||
| 4×100 m | men | women |
| Synchronised swimming | ||
| Solo | ||
| Technical | women | |
| Free | women | |
| Duet | ||
| Technical | women | |
| Free | women | |
| Team | ||
| Technical | women | |
| Free | women | |
| Combination | women | |
| Water polo | ||
| Tournament | men | women |
The heats for the Women's 800 m Freestyle race at the 2009 World Championships took place on the morning of 31 July and the final will take place in the evening session of 1 August at the Foro Italico in Rome, Italy.
Prior to this competition, the existing world and competition records were as follows:
| World record |  Rebecca Adlington (GBR) | 8:14.10 | Beijing, China | 16 August 2008 |
| Championship record |  Kate Ziegler (USA) | 8:18.52 | Melbourne, Australia | 31 March 2007 |
The following records were established during the competition:
| Date | Round | Name | Nationality | Time | Record |
|---|---|---|---|---|---|
| 1 August | Final | Lotte Friis |  Denmark | 8:15.92 | CR |
| Rank | Name | Nationality | Time | Lane | Notes |
|---|---|---|---|---|---|
 | Lotte Friis [1] | Denmark | 8:15.92 | 2 | CR , NR |
 | Joanne Jackson [2] | Great Britain | 8:16.66 | 5 | |
 | Alessia Filippi [3] |  Italy | 8:17.21 | 6 | NR |
| 4 | Rebecca Adlington [2] [4] | Great Britain | 8:17.90 | 4 | |
| 5 | Camelia Potec |  Romania | 8:20.44 | 3 | |
| 6 | Erika Villaécija García |  Spain | 8:25.97 | 7 | |
| 7 | Ophélie-Cyrielle Étienne |  France | 8:26.35 | 8 | |
| 8 | Wendy Trott |  South Africa | 8:29.61 | 1 | |
| 9 | Kristel Köbrich |  Chile | 8:30.10 | 0 | |
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