| Noc: | BIZ |
| Nocname: | Belize Olympic and Commonwealth Games Association |
| Year: | 2003 |
| Date: | 1–17 August 2003 |
| Games: | Pan American Games |
| Location: | Santo Domingo |
| Flagbearer: | Leonard Arnold[1] |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Rank: | 33 |
| Appearances: |
The 14th Pan American Games were held in Santo Domingo, Dominican Republic from August 1 to August 17, 2003.
See main article: Athletics at the 2003 Pan American Games.
| Athlete | Event | Heat | Final | |||
|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | |||
| width=20% | Michael Aguilar | Men's 400 m hurdles | 51.55 | 12 | - | 12 |
| Jayson Jones[2] | 100 m | 10.82 | 6 | - | ||
| Jayson Jones | 200 m | 21.80 | 7 | |||
| Patrick Fuller | 5,000 m | 14:39.23 | 8 | |||