The Road Individual Time Trial at the 2003 Pan American Games in Santo Domingo, Dominican Republic was held on the second day of the cycling competition, on 11 August 2003.
| Rank | Name | Time | |
|---|---|---|---|
| 1 | 1:04.45 | ||
| 2 | + 0.39 | ||
| 3 | + 0.55 | ||
| 4 | + 1.25 | ||
| 5 | + 1.45 | ||
| 6 | + 2.14 | ||
| 7 | + 2.26 | ||
| 8 | + 2.39 | ||
| 9 | + 2.55 | ||
| 10 | + 3.17 | ||
| 11 | + 3.28 | ||
| 12 | + 5.23 | ||
| 13 | + 5.25 | ||
| 14 | + 5.33 | ||
| 15 | + 6.17 | ||
| 16 | + 7.47 | ||
| 17 | + 7.52 | ||
| 18 | + 8.49 | ||
| 19 | + 12.00 | ||
| - | DNS |
| Rank | Name | Time | |
|---|---|---|---|
| 1 | 41.11.00 | ||
| 2 | + 0.38 | ||
| 3 | + 1.32 | ||
| 4 | + 2.01 | ||
| 5 | + 2.30 | ||
| 6 | + 2.49 | ||
| 7 | + 3.05 | ||
| 8 | + 3.08 | ||
| 9 | + 3.20 | ||
| 10 | + 3.21 | ||
| 11 | + 4.31 | ||
| 12 | + 4.33 | ||
| 13 | + 4.35 | ||
| 14 | + 4.42 | ||
| 15 | + 4.54 | ||
| 16 | + 5.05 | ||
| 17 | + 7.29 | ||
| 17 | + 7.29 | ||
| - | DNS |