| Noc: | CAY |
| Nocname: | Cayman Islands Olympic Committee |
| Year: | 2003 |
| Date: | 1–17 August 2003 |
| Games: | Pan American Games |
| Location: | Santo Domingo |
| Flagbearer: | Olney Thompson[1] |
| Gold: | 0 |
| Silver: | 1 |
| Bronze: | 0 |
| Rank: | 24 |
| Appearances: | auto |
| App Begin Year: | 1987 |
The 14th Pan American Games were held in Santo Domingo, Dominican Republic from August 1 to August 17, 2003.
See main article: Swimming at the 2003 Pan American Games.
| Athlete | Event | Heat | Final | |||
|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | |||
| width=30% | Kaitlyn Elphinstone | 200 m freestyle | 2:10.23 | 15 | 2:08.90 | 14 |
| width=30% | Kaitlyn Elphinstone | 400 m freestyle | 4:30.25 | 12 | 4:28.73 | 12 |
| width=30% | Heather Roffey | 4:31.35 | 13 | 4:29.57 | 13 | |
| width=30% | Kaitlyn Elphinstone | 800 m freestyle | - | 9:25.06 | 10 | |