# Swimming at the 2007 World Aquatics Championships – Women's 400 metre freestyle

The women's 400 metre freestyle at the 2007 World Aquatics Championships took place on 25 March (preliminaries and finals) at Rod Laver Arena in Melbourne, Australia.
The existing records at the start of the event were:
* World record (WR): 4:02.13, Laure Manaudou (France), 6 August 2006 in Budapest, Hungary
* Championship record (CR): 4:06.28, Tracey Wickham (Australia), at West Berlin 1978 (24 August 1978)

## Results
### Final

| Place | Lane | Name | Nationality | Splits (50m, 100m, 150m...350m) | Time | Notes |
| | 4 | Laure Manaudou | France | 27.35 57.34 1:27.69 1:58.69 2:29.73 3:01.10 3:32.36 | 4:02.61 | CR |
| | 7 | Otylia Jędrzejczak | Poland | 28.86 59.55 1:30.79 2:02.04 2:32.77 3:03.53 3:34.28 | 4:04.23 | NR |
| | 3 | Ai Shibata | Japan | 28.54 59.15 1:30.38 2:01.58 2:32.57 3:03.95 3:34.88 | 4:05.19 | NR |
| 4 | 8 | Katie Hoff | USA | 29.16 1:00.14 1:30.80 2:02.68 2:33.35 3:04.33 3:35.20 | 4:05.65 | |
| 5 | 5 | Federica Pellegrini | Italy | 28.94 59.86 1:30.80 2:02.16 2:33.04 3:04.46 3:35.38 | 4:05.79 | |
| 6 | 6 | Kate Ziegler | USA | 28.88 59.69 1:30.74 2:02.30 2:33.44 3:05.04 3:36.63 | 4:06.99 | |
| 7 | 1 | Joanne Jackson | Great Britain | 28.39 59.36 1:30.35 2:02.08 2:33.33 3:05.16 3:36.56 | 4:07.42 | |
| 8 | 2 | Linda Mackenzie | Australia | 28.36 59.39 1:30.66 2:02.27 2:33.63 3:05.23 3:36.69 | 4:07.64 | |

### Preliminary heats

| Rank | Heat & Lane | Name | Nationality | Time | Note |
| 1 | H9 L4 | Laure Manaudou | France | 4:05.29 | Q, CR |
| 2 | H9 L6 | Federica Pellegrini | Italy | 4:06.51 | Q |
| 3 | H8 L5 | Ai Shibata | Japan | 4:07.17 | Q |
| 4 | H8 L4 | Kate Ziegler | United States | 4:07.18 | Q |
| 5 | H9 L5 | Linda Mackenzie | Australia | 4:07.26 | Q |
| 6 | H7 L2 | Otylia Jędrzejczak | Poland | 4:08.16 | Q |
| 7 | H9 L3 | Joanne Jackson | Great Britain | 4:08.17 | Q |
| 8 | H7 L4 | Katie Hoff | United States | 4:08.38 | Q |
| 8.5 | | | | | |
| 9 | H7 L5 | Caitlin McClatchey | Great Britain | 4:08.52 | |
| 10 | H8 L3 | Bronte Barratt | Australia | 4:08.99 | |
| 11 | H9 L7 | Sophie Huber | France | 4:09.80 | |
| 12 | H8 L7 | Brittany Reimer | Canada | 4:10.85 | |
| 13 | H8 L2 | Miao Tan | China | 4:11.37 | |
| 14 | H9 L2 | Arantxa Ramos Plasencia | Spain | 4:11.40 | |
| 15 | H8 L6 | Camelia Potec | Romania | 4:11.83 | |
| 16 | H8 L1 | Flavia Rigamonti | Switzerland | 4:11.85 | |
| 17 | H9 L1 | Helen Norfolk | New Zealand | 4:11.98 | |
| 18 | H7 L8 | Lotte Friis | Denmark | 4:12.99 | |
| 19 | H7 L1 | Wendy Trott | South Africa | 4:13.92 | |
| 20 | H7 L6 | Yu Rui | China | 4:13.94 | |
| 21 | H8 L8 | Tanya Hunks | Canada | 4:14.68 | |
| 22 | H7 L3 | Sachiko Yamada | Japan | 4:15.40 | |
| 23 | H7 L7 | Cecilia Elizabeth Biagioli | Argentina | 4:16.71 | |
| 24 | H6 L5 | Agata Zwiejska | Poland | 4:17.50 | |
| 25 | H6 L6 | Melissa Ingram | New Zealand | 4:20.05 | |
| 26 | H6 L8 | Andreina Pinto | Venezuela | 4:20.84 | |
| 27 | H5 L4 | Golda Marcus | El Salvador | 4:22.17 | |
| 28 | H5 L8 | Ming Xiu Ong | Malaysia | 4:22.43 | |
| 29 | H6 L4 | Chin Kuei Yang | Chinese Taipei | 4:22.59 | |
| 30 | H6 L1 | Charlotte Johannsen | Denmark | 4:22.76 | |
| 31 | H6 L7 | Tin Wen Quah | Singapore | 4:23.57 | |
| 32 | H6 L2 | Carmen Nam | Hong Kong | 4:24.07 | |
| 33 | H5 L7 | Nimitta Thaveesupsoonthorn | Thailand | 4:24.38 | |
| 34 | H5 L5 | Maroua Mathlouthi | Tunisia | 4:24.47 | |
| 35 | H5 L6 | Monika Mocnik | Slovenia | 4:24.96 | |
| 36 | H4 L5 | Erica Totten | Philippines | 4:25.13 | |
| 37 | H4 L7 | Kimberly Eeson | Zimbabwe | 4:26.23 | |
| 38 | H4 L4 | Lynette Lim | Singapore | 4:26.97 | |
| 39 | H9 L8 | Ji Eun Lee | South Korea | 4:27.29 | |
| 40 | H5 L3 | Heysi Villarreal Navarro | Cuba | 4:30.50 | |
| 41 | H6 L3 | Shrone Austin | Seychelles | 4:30.56 | |
| 42 | H4 L2 | Maria Gandionco | Philippines | 4:30.98 | |
| 43 | H5 L1 | Sarah Hadj Aberrahmane | Algeria | 4:32.08 | |
| 44 | H4 L8 | Maria Alejandra Torres | Peru | 4:32.85 | |
| 45 | H4 L3 | Raffaella Rodoni Palma | Chile | 4:32.98 | |
| 46 | H3 L7 | Mona Simonsen | Faroe Islands | 4:34.47 | |
| 47 | H5 L2 | Cai Lin Khoo | Malaysia | 4:35.96 | |
| 48 | H4 L1 | Fiorella Gomez-Sanchez | Peru | 4:36.04 | |
| 49 | H3 L2 | Jutta Thomsen | Faroe Islands | 4:36.15 | |
| 50 | H4 L6 | Pin Chieh Nieh | Chinese Taipei | 4:36.23 | |
| 51 | H3 L6 | Noufissa Chbihi | Morocco | 4:37.84 | |
| 52 | H3 L4 | Matana Wellman | Zambia | 4:38.06 | |
| 53 | H2 L6 | Ranohon Amanova | Uzbekistan | 4:41.26 | |
| 54 | H3 L3 | Valerie Eman | Aruba | 4:42.33 | |
| 55 | H3 L5 | Tuesday Watts | Grenada | 4:43.79 | |
| 56 | H3 L8 | Marike Meyer | Namibia | 4:44.24 | |
| 57 | H2 L1 | Shannon Austin | Seychelles | 4:44.96 | |
| 58 | H2 L5 | Miriam Hatamleh | Jordan | 4:47.43 | |
| 59 | H3 L1 | Pooja Raghava Alva | India | 4:50.32 | |
| 60 | H2 L3 | Hiba Bashouti | Jordan | 4:58.89 | |
| 61 | H2 L7 | Tojohanitra Andiamanjatoprimamama | Madagascar | 5:01.53 | |
| 62 | H2 L4 | Man Wai Fong | Macau | 5:03.89 | |
| 63 | H1 L4 | Sarah Elizabeth Johnson | Northern Mariana Islands | 5:05.03 | |
| 64 | H2 L8 | Sakina Ghulam | Pakistan | 5:11.10 | |
| 65 | H1 L5 | Frances Nagatalevu | Fiji | 5:27.81 | |
| 999 | H1 L3 | Ogom Obianugba | Nigeria | DNS | |
| 999 | H2 L2 | Ngozi Monu | Nigeria | DNS | |