The Women's 800m Freestyle event at the 2003 Pan American Games took place on August 16, 2003 (Day 15 of the Games).
At this race, Kristel Köbrich won the first medal of her country in swimming at Pan American Games at all times.
| 8:16.22 | 1989-08-20 | ||||
| 8:34.65 | 1999-08-06 |  Winnipeg, Canada |
| Place | Swimmer | Time | |
|---|---|---|---|
| 1 | 8:36.54 | ||
| 2 | 8:37.61 | ||
| 3 | 8:43.90 | ||
| 4 | 8:45.82 | ||
| 5 | 8:53.64 | ||
| 6 | 9:00.42 | ||
| 7 | 9:01.61 | ||
| 8 | 9:03.48 | ||
| 9 | 9:13.51 | ||
| 10 | 9:25.06 | ||
| 11 | 9:31.88 |