Open water swimming at the 2003 World Aquatics Championships
These are the results of the open water swimming competition at the 2003 World Aquatics Championships, which took place in Barcelona, Spain.
Medal table
| 1 |  Russia |
3 | 0 | 1 | 4 |
| 2 |  Italy |
2 | 0 | 0 | 2 |
| 3 |  Netherlands |
1 | 0 | 1 | 2 |
| 4 |  Germany |
0 | 4 | 2 | 6 |
| 5 |  Spain |
0 | 1 | 1 | 2 |
| 6 |  Czech Republic |
0 | 1 | 0 | 1 |
| 7 |  Bulgaria |
0 | 0 | 1 | 1 |
Medal summary
Men
| Event | Gold | Silver | Bronze |
| 5 km |
Evgeni Kochkarov (RUS) 53.11.9 |
Christian Hein (GER) 53.13.9 |
Vladimir Dyatchin (RUS) 53.14.8 |
| 10 km |
Vladimir Dyatchin (RUS) 1:50.58.8 |
Christian Hein (GER) 1:51.06.5 |
David Meca (ESP) 1:51.08.4 |
| 25 km |
Yuri Kudinov (RUS) 5:02.20.0 |
David Meca (ESP) 5:02.20.4 |
Petar Stoychev (BUL) 5:02.20.6 |
Women
| Event | Gold | Silver | Bronze |
| 5 km |
Viola Valli (ITA) 57.01.2 |
Jana Pechanová (CZE) 57.03.9 |
Britta Kamrau (GER) 59.06.4 |
| 10 km |
Viola Valli (ITA) 1:59.49.9 |
Angela Maurer (GER) 1:59.51.1 |
Edith van Dijk (NED) 1:59.53.0 |
| 25 km |
Edith van Dijk (NED) 5:35.43.5 |
Britta Kamrau (GER) 5:35.46.1 |
Angela Maurer (GER) 5:35.46.5 |