Swimming at the 2003 World Aquatics Championships – Women's 400 metre individual medley
# Swimming at the 2003 World Aquatics Championships – Women's 400 metre individual medley

The Women's 400m Individual Medley event at the 10th FINA World Aquatics Championships swam 27 July 2003 in Barcelona, Spain. Preliminary heats swam in the morning session, with the top-8 finishers advancing to swim again in the Final that evening.

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

* WR: 4:33.59 swum by Yana Klochkova (Ukraine) on September 16, 2000 in Sydney, Australia.
* CR: 4:36.10 swum by Petra Schneider (East Germany) on August 1, 1982 in Guayaquil, Ecuador

## Results

### Final

| Place | Swimmer | Nation | Time |
| - | - | - | - |
| 1 | Yana Klochkova | Ukraine | 4:36.74 |
| 2 | Éva Risztov | Hungary | 4:37.39 |
| 3 | Beatrice Câșlaru | Romania | 4:41.86 |
| 4 | Maggie Bowen | USA | 4:43.21 |
| 5 | Nicole Hetzer | Germany | 4:43.32 |
| 6 | Diana Remenyi | Hungary | 4:45.67 |
| 7 | Georgina Bardach | Argentina | 4:46.06 |
| 8 | Jennifer Reilly | Australia | 4:48.11 |

### Preliminaries

| Rank | Heat+Lane | Swimmer | Nation | Time | Notes |
| - | - | - | - | - | - |
| 1 | H4 L4 | Éva Risztov | Hungary | 4:42.89 | q |
| 2 | H4 L5 | Nicole Hetzer | Germany | 4:43.48 | q |
| 3 | H5 L4 | Yana Klochkova | Ukraine | 4:44.14 | q |
| 4 | H3 L3 | Beatrice Câșlaru | Romania | 4:44.26 | q |
| 5 | H4 L3 | Diana Remenyi | Hungary | 4:44.77 | q |
| 6 | H4 L2 | Georgina Bardach | Argentina | 4:45.16 | q |
| 7 | H5 L5 | Jennifer Reilly | Australia | 4:45.57 | q |
| 8 | H3 L5 | Maggie Bowen | United States | 4:47.08 | q |
| 9 | H3 L6 | Maiko Fujino | Japan | 4:47.17 | |
| 10 | H3 L4 | Hui Qi | China | 4:47.20 | |
| 11 | H5 L2 | Yana Tolkatcheva | Russia | 4:47.72 | |
| 12 | H4 L6 | Tianyi Zhang | China | 4:47.84 | |
| 13 | H2 L6 | Otylia Jędrzejczak | Poland | 4:48.59 | |
| 14 | H2 L4 | Kirsty Coventry | Zimbabwe | 4:48.75 | |
| 15 | H3 L1 | Joanna Maranhão | Brazil | 4:49.04 | |
| 16 | H3 L2 | Elizabeth Warden | Canada | 4:49.28 | |
| 17 | H5 L3 | Maddy Crippen | United States | 4:50.28 | |
| 18 | H5 L1 | Paula Carballido | Spain | 4:50.44 | |
| 19 | H5 L6 | Elizabeth Van Welie | New Zealand | 4:51.42 | |
| 20 | H4 L1 | Helen Norfolk | New Zealand | 4:51.54 | |
| 21 | H4 L7 | Jessica Abbott | Australia | 4:52.72 | |
| 22 | H5 L7 | Yana Martynova | Russia | 4:53.77 | |
| 23 | H4 L8 | Julie Hjorth-Hansen | Denmark | 4:54.30 | |
| 24 | H3 L8 | Inbal Levavi | Israel | 4:54.31 | |
| 25 | H3 L7 | Yuliya Pidlisna | Ukraine | 4:55.12 | |
| 26 | H2 L5 | Yi Ting Siow | Malaysia | 5:01.20 | |
| 27 | H5 L8 | Veronica Massari | Italy | 5:01.50 | |
| 28 | H2 L3 | Elisabeth Jarland | Norway | 5:02.54 | |
| 29 | H2 L7 | Vanessa Duenas Uribe | Colombia | 5:07.33 | |
| 30 | H2 L8 | Richa Mishra | India | 5:11.67 | |
| 31 | H2 L2 | Wing Suet Chan | Hong Kong | 5:11.69 | |
| 32 | H2 L1 | Sabria Dahane | Algeria | 5:15.88 | |
| 33 | H1 L4 | Shrone Austin | Seychelles | 5:17.39 | |
| 34 | H1 L5 | Jamie Shufflebarger | Virgin Islands | 5:24.89 | |
| 35 | H1 L3 | Susan Anchia | Costa Rica | 5:28.37 | |
| 36 | H1 L6 | Ana Galindo | Honduras | 5:37.85 | |
| - | - | Jakie Wellman | Zambia | DNS | |
