# Swimming at the 2009 World Aquatics Championships – Women's 800 metre freestyle

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.

## Records

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 |

## Heats

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Rebecca Adlington | Great Britain | 8:20.53 | 5 | 4 | |
| 2 | Joanne Jackson | Great Britain | 8:20.80 | 3 | 4 | |
| 3 | Camelia Potec | Romania | 8:22.03 | 4 | 4 | |
| 4 | Alessia Filippi | Italy | 8:24.03 | 5 | 5 | |
| 5 | Lotte Friis | Denmark | 8:25.72 | 4 | 5 | |
| 6 | Erika Villaécija García | Spain | 8:26.58 | 5 | 3 | |
| 7 | Wendy Trott | South Africa | 8:27.26 | 3 | 3 | |
| 8 | Kristel Köbrich | Chile | 8:27.90 | 3 | 2 | SA |
| 8 | Ophelie-Cyrielle Etienne | France | 8:27.90 | 4 | 6 | |
| 10 | Chloe Sutton | United States | 8:29.25 | 5 | 6 | |
| 11 | Coralie Balmy | France | 8:31.39 | 4 | 3 | |
| 12 | Eider Santamaria | Spain | 8:33.51 | 4 | 2 | |
| 13 | Andreina Pinto | Venezuela | 8:34.17 | 3 | 6 | |
| 14 | Ren Junni | China | 8:36.14 | 4 | 1 | |
| 15 | Melissa Gorman | Australia | 8:36.37 | 3 | 7 | |
| 16 | Jordis Steinegger | Austria | 8:36.82 | 5 | 8 | |
| 17 | Patricia Castañeda Miyamoto | Mexico | 8:36.98 | 3 | 9 | NR |
| 18 | Blair Evans | Australia | 8:38.10 | 5 | 2 | |
| 19 | Elena Sokolova | Russia | 8:39.09 | 3 | 5 | |
| 20 | Nuala Murphy | Ireland | 8:39.17 | 4 | 9 | NR |
| 21 | Maiko Fujino | Japan | 8:40.18 | 5 | 1 | |
| 22 | Gráinne Murphy | Ireland | 8:40.23 | 5 | 9 | |
| 23 | Susana Escobar | Mexico | 8:41.10 | 4 | 8 | |
| 24 | Lynette Lim | Singapore | 8:42.16 | 2 | 2 | |
| 25 | Natsumi Iwashita | Japan | 8:44.43 | 3 | 1 | |
| 26 | Swann Oberson | Switzerland | 8:44.93 | 2 | 4 | |
| 27 | Yanel Pinto | Venezuela | 8:45.45 | 2 | 1 | |
| 28 | Haley Anderson | United States | 8:45.91 | 4 | 7 | |
| 29 | Nina Cesar | Slovenia | 8:47.51 | 5 | 7 | |
| 30 | Savannah King | Canada | 8:48.01 | 5 | 0 | |
| 31 | Iris Matthey | Switzerland | 8:49.28 | 2 | 5 | |
| 32 | Yang Chin-Kuei | Chinese Taipei | 8:49.70 | 2 | 6 | |
| 33 | Nina Dittrich | Austria | 8:51.65 | 3 | 0 | |
| 34 | Erica Cirila Totten | Philippines | 8:53.34 | 2 | 8 | NR |
| 35 | Cho Youn Soo | South Korea | 8:56.08 | 2 | 7 | |
| 36 | Nika Karlina Petric | Slovenia | 8:56.71 | 3 | 8 | |
| 37 | Samantha Arevalo | Ecuador | 9:05.74 | 2 | 0 | |
| 38 | Khoo Cai Lin | Malaysia | 9:05.77 | 2 | 3 | |
| 39 | Koh Hui Yu | Singapore | 9:10.25 | 1 | 5 | |
| 40 | Andrea Cedron | Peru | 9:14.90 | 1 | 4 | |
| 41 | Nada Abbas | Egypt | 9:15.62 | 2 | 9 | |
| 42 | Ting Sheng-Yo | Chinese Taipei | 9:20.80 | 1 | 3 | |
| 43 | Daniela Miyahara Coello | Peru | 9:25.02 | 1 | 6 | |
| 44 | Miriam Hatamleh | Jordan | 9:39.87 | 1 | 2 | |
| 45 | Nicole Huerta | Dominican Republic | 9:53.98 | 1 | 7 | |
| 46 | Ghulam Sakina | Pakistan | 10:05.79 | 1 | 1 | NR |
| 47 | Tieri Erasito | Fiji | 10:52.89 | 1 | 8 | |
| — | Federica Pellegrini | Italy | DNS | 1 | 0 | |
| — | Paula Zukowska | Poland | DNS | 1 | 9 | |
| — | Tanya Hunks | Canada | DNS | 4 | 0 | |

## Final

| Rank | Name | Nationality | Time | Lane | Notes |
| | Lotte Friis | Denmark | 8:15.92 | 2 | CR, NR |
| | Joanne Jackson | Great Britain | 8:16.66 | 5 | |
| | Alessia Filippi | Italy | 8:17.21 | 6 | NR |
| 4 | Rebecca Adlington | 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 | |