| Open water swimming at the 2003 World Aquatics Championships | |
| Hostcity: | Barcelona, Spain |
| Venues: | Notre Dame Island |
| Events: | 6 |
| Previous: | 2001 |
| Next: | 2005 |
These are the results of the open water swimming competition at the 2003 World Aquatics Championships, which took place in Barcelona, Spain.
| width=150 | Event | width=250 bgcolor=gold | Gold | width=250 bgcolor=silver | Silver | width=250 bgcolor=CC9966 | Bronze |
| 5 km | 53.11.9 | 53.13.9 | 53.14.8 | ||||
| 10 km | 1:50.58.8 | 1:51.06.5 | 1:51.08.4 | ||||
| 25 km | 5:02.20.0 | 5:02.20.4 | 5:02.20.6 |
| width=150 | Event | width=250 bgcolor=gold | Gold | width=250 bgcolor=silver | Silver | width=250 bgcolor=CC9966 | Bronze |
| 5 km | 57.01.2 | 57.03.9 | 57.06.4 | ||||
| 10 km | 1:59.49.9 | 1:59.51.1 | 1:59.53.0 | ||||
| 25 km | 5:35.43.5 | 5:35.46.1 | 5:35.46.5 |