Swimming at the 2005 World Aquatics Championships – Women's 400 metre freestyle
# Swimming at the 2005 World Aquatics Championships – Women's 400 metre freestyle

The Women's 400 Freestyle at the 11th FINA World Aquatics Championships was swum on 24 July 2005 in Montreal, Quebec, Canada. Preliminary heats were swum that morning, with the top-8 finishers advancing to swim the race again in that evenings Final.

As the competition was held in a long course (50m) pool, the race consisted of 8 lengths of freestyle.

At the start of the event, the existing World (WR) and Championships (CR) records were:

* WR: 4:03.85, Janet Evans (USA), swum 22 September 1988 in Seoul, South Korea;
* CR: 4:06.28, Tracey Wickham (Australia), swum 24 August 1978 in Berlin, Germany.

## Results

### Prelims

| Rank | Heat + Lane | Swimmer | Nation | Time | Notes |
| - | - | - | - | - | - |
| 1 | H3 L2 | Brittany Reimer | Canada | 4:08.28 | q |
| 2 | H3 L5 | Camelia Potec | Romania | 4:08.40 | q |
| 3 | H3 L4 | Ai Shibata | Japan | 4:08.82 | q |
| 4 | H5 L5 | Joanne Jackson | Great Britain | 4:10.47 | q |
| 5 | H4 L4 | Caitlin McClatchey | Great Britain | 4:10.48 | q |
| 6 | H4 L3 | Claudia Poll | Costa Rica | 4:10.88 | q |
| 7 | H4 L5 | Linda Mackenzie | Australia | 4:11.13 | q |
| 8 | H5 L4 | Laure Manaudou | France | 4:11.46 | q |
| 9 | H5 L3 | Haylee Reddaway | Australia | 4:11.75 | |
| 10 | H5 L6 | Carly Piper | United States | 4:12.96 | |
| 11 | H4 L2 | Jana Henke | Germany | 4:13.68 | |
| 12 | H4 L6 | Sachiko Yamada | Japan | 4:13.97 | |
| 13 | H5 L2 | Éva Risztov | Hungary | 4:14.10 | |
| 14 | H5 L7 | Cecilia Biagioli | Argentina | 4:14.48 | |
| 15 | H3 L7 | Sophie Huber | France | 4:15.53 | |
| 16 | H3 L6 | Kelsey Ditto | United States | 4:15.63 | |
| 17 | H3 L1 | Melissa Corfe | South Africa | 4:15.95 | |
| 18 | H4 L1 | Anja Čarman | Slovenia | 4:16.28 | |
| 19 | H2 L1 | Mariana Brochado | Brazil | 4:17.65 | |
| 20 | H5 L8 | Ji Eun Lee | South Korea | 4:18.05 | |
| 21 | H4 L8 | Kristel Köbrich | Chile | 4:18.41 | |
| 22 | H3 L3 | Jingzhi Tang | China | 4:18.71 | |
| 23 | H2 L4 | Lauren Boyle | New Zealand | 4:19.22 | |
| 24 | H3 L8 | Melissa Ingram | New Zealand | 4:19.28 | |
| 25 | H4 L7 | Monique Ferreira | Brazil | 4:19.42 | |
| 26 | H2 L6 | Olga Beresneva | Israel | 4:24.27 | |
| 27 | H2 L2 | Chin-Kuei Yang | Chinese Taipei | 4:26.03 | |
| 28 | H2 L7 | Ea Hyun Jung | South Korea | 4:26.46 | |
| 29 | H2 L3 | Paola Duguet | Colombia | 4:26.57 | |
| 30 | H1 L2 | Shrone Austin | Seychelles | 4:28.36 | |
| 31 | H1 L5 | Jasna Ovsenik | Slovenia | 4:28.43 | |
| 32 | H2 L5 | Wan-Tong Cheng | Chinese Taipei | 4:31.39 | |
| 33 | H2 L8 | Ting Wen Quah | Singapore | 4:31.48 | |
| 34 | H1 L6 | Nimitta Thaveesupsoonthorn | Thailand | 4:33.39 | |
| 35 | H1 L3 | Wing Yan Fung | Hong Kong | 4:35.34 | |
| 36 | H1 L4 | Wan Ting Goh | Singapore | 4:35.56 | |
| - | H5 L1 | Tanya Hunks | Canada | DNS | |

### Final

| Rank | Name | Nationality | Time |
| - | - | - | - |
| | Laure Manaudou | France | 4:06.44 |
| | Ai Shibata | Japan | 4:06.74 |
| | Caitlin McClatchey | Great Britain | 4:07.25 |
| 4 | Brittany Reimer | Canada | 4:07.32 |
| 5 | Camelia Potec | Romania | 4:08.06 |
| 6 | Linda Mackenzie | Australia | 4:08.75 |
| 7 | Joanne Jackson | Great Britain | 4:08.88 |
| 8 | Claudia Poll | Costa Rica | 4:10.02 |
