# Swimming at the 2009 World Aquatics Championships – Women's 400 metre freestyle

The Women's 400 m Freestyle race at the 2009 World Championships was held on 26 July at the Foro Italico in Rome, Italy.

## Records

| World record | Federica Pellegrini (ITA) | 4:00.41 | Pescara, Italy | 27 June 2009 |
| Championship record | Laure Manaudou (FRA) | 4:02.61 | Melbourne, Australia | 25 March 2007 |
The following records were established during the competition:
| Date | Round | Name | Nationality | Time | Record |
| 26 July | Heat 6 | Federica Pellegrini | Italy | 4:01.96 | CR |
| 26 July | Final | Federica Pellegrini | Italy | 3:59.15 | WR |

## Heats

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Federica Pellegrini | Italy | 4:01.96 | 6 | 4 | CR |
| 2 | Allison Schmitt | United States | 4:02.80 | 6 | 3 | |
| 3 | Joanne Jackson | Great Britain | 4:03.48 | 5 | 4 | |
| 4 | Coralie Balmy | France | 4:04.12 | 5 | 5 | |
| 5 | Camelia Potec | Romania | 4:04.25 | 6 | 5 | |
| 6 | Ophélie-Cyrielle Étienne | France | 4:05.25 | 5 | 6 | |
| 7 | Lotte Friis | Denmark | 4:05.40 | 4 | 3 | NR |
| 8 | Rebecca Adlington | Great Britain | 4:05.70 | 4 | 4 | |
| 9 | Ellen Fullerton | Australia | 4:08.31 | 4 | 2 | |
| 10 | Erika Villaécija García | Spain | 4:08.77 | 5 | 2 | |
| 11 | Jördis Steinegger | Austria | 4:09.30 | 6 | 7 | NR |
| 12 | Cecilia Elizabeth Biagioli | Argentina | 4:10.16 | 4 | 1 | SA |
| 13 | Chloe Sutton | United States | 4:10.88 | 6 | 6 | |
| 14 | Alexa Komarnycky | Canada | 4:11.35 | 6 | 1 | |
| 15 | Wendy Trott | South Africa | 4:11.45 | 6 | 2 | |
| 16 | Maiko Fujino | Japan | 4:11.52 | 6 | 0 | |
| 17 | Flavia Zoccari | Italy | 4:11.58 | 5 | 7 | |
| 18 | Andreina Pinto | Venezuela | 4:11.79 | 5 | 0 | NR |
| 19 | Nuala Murphy | Ireland | 4:13.51 | 3 | 3 | |
| 20 | Savannah King | Canada | 4:13.58 | 5 | 8 | |
| 21 | Patricia Castañeda | Mexico | 4:13.59 | 4 | 8 | |
| 22 | Quah Ting Wen | Singapore | 4:13.70 | 5 | 9 | NR |
| 23 | Ren Junni | China | 4:14.07 | 4 | 6 | |
| 24 | Elena Sokolova | Russia | 4:14.38 | 5 | 3 | |
| 25 | Susana Escobar | Mexico | 4:14.70 | 5 | 1 | |
| 26 | Yanel Pinto | Venezuela | 4:14.74 | 3 | 6 | |
| 27 | Bronte Barratt | Australia | 4:15.62 | 4 | 5 | |
| 28 | Natsumi Iwashita | Japan | 4:15.95 | 4 | 7 | |
| 29 | Yang Chin-Kuei | Chinese Taipei | 4:15.96 | 6 | 9 | |
| 30 | Lynette Lim | Singapore | 4:16.35 | 3 | 7 | |
| 31 | Paula Żukowska | Poland | 4:16.64 | 3 | 5 | |
| 32 | Ionela Cozma | Romania | 4:16.79 | 2 | 2 | |
| 33 | Niamh O'Sullivan | Ireland | 4:16.80 | 3 | 4 | |
| 34 | Nina Cesar | Slovenia | 4:17.22 | 4 | 0 | |
| 35 | Cho Youn Soo | South Korea | 4:17.59 | 3 | 1 | |
| 36 | Nika Karlina Petric | Slovenia | 4:18.14 | 6 | 8 | |
| 37 | Heysi Villareal | Cuba | 4:20.94 | 3 | 0 | |
| 38 | Erica Cirila Totten | Philippines | 4:21.32 | 2 | 4 | |
| 39 | Pamela Benitez | El Salvador | 4:21.58 | 3 | 9 | |
| 40 | Jeong Darae | South Korea | 4:22.99 | 2 | 5 | |
| 41 | Kristina Bernice Lennox | Puerto Rico | 4:23.26 | 3 | 8 | |
| 42 | Khoo Cai Lin | Malaysia | 4:24.48 | 4 | 9 | |
| 43 | Kimberley Eeson | Zimbabwe | 4:27.89 | 3 | 2 | |
| 44 | Andrea Cedron | Peru | 4:29.80 | 2 | 3 | |
| 45 | Kirsten Lapham | Zimbabwe | 4:33.57 | 1 | 3 | |
| 46 | Ting Sheng-Yo | Chinese Taipei | 4:33.72 | 2 | 1 | |
| 47 | Daniela Kaori Miyahara Coello | Peru | 4:33.75 | 2 | 6 | |
| 48 | Daniela Reyes Hinrichsen | Chile | 4:34.09 | 2 | 7 | |
| 49 | Miriam Hatamleh | Jordan | 4:41.02 | 2 | 0 | |
| 50 | Nicole Huerta | Dominican Republic | 4:41.73 | 1 | 5 | |
| 51 | Ayesha Noel | Grenada | 4:46.09 | 2 | 9 | |
| 52 | Vo Thi Thanh Vy | Vietnam | 4:47.11 | 2 | 8 | |
| 53 | Diana Al Zamel | Syria | 4:47.98 | 1 | 4 | |
| 54 | Sakina Ghulam | Pakistan | 4:59.02 | 1 | 6 | |
| 55 | Estellah Fils Rabetsara | Madagascar | 5:04.36 | 1 | 2 | |
| 56 | Tieri Erasito | Fiji | 5:10.01 | 1 | 7 | |
| 57 | Mahnoor Maqsood | Pakistan | 5:18.16 | 1 | 8 | |
| — | Sara Abdullahu | Albania | DNS | 1 | 1 | |

## Final

| Rank | Name | Nationality | Lane | Time | Notes |
| | Federica Pellegrini | Italy | 4 | 3:59.15 | WR |
| | Joanne Jackson | Great Britain | 3 | 4:00.60 | NR |
| | Rebecca Adlington | Great Britain | 8 | 4:00.79 | |
| 4 | Allison Schmitt | United States | 5 | 4:02.51 | |
| 5 | Coralie Balmy | France | 6 | 4:03.29 | |
| 6 | Camelia Potec | Romania | 2 | 4:03.41 | NR |
| 7 | Ophélie-Cyrielle Étienne | France | 7 | 4:04.54 | |
| 8 | Lotte Friis | Denmark | 1 | 4:07.62 | |