The men's decathlon event of the 2003 Pan American Games took place on Tuesday 5 August and Wednesday 6 August 2003.
Medalists edit
| Gold | Stephen Moore United States
|
| Silver | Luiggy Llanos Puerto Rico
|
| Bronze | Yonelvis Águila Cuba
|
Records edit
| World record |  Roman Šebrle (CZE) |
9026 | 27 May 2001 |  Götzis, Austria
|
| Pan Am record | Chris Huffins (USA) |
8170 | 25 July 1999 |  Winnipeg, Canada
|
Results edit
| Rank | Athlete | Decathlon | Points | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |||
| 1 |  Stephen Moore (USA) |
10.75 | 7.30 | 11.83 | 2.10 | 48.16 | 14.79 | 42.44 | 4.50 | 50.35 | 4:41.71 | 7809 |
| 2 |  Luiggy Llanos (PUR) |
11.02 | 7.47 | 14.62 | 1.86 | 50.27 | 14.29 | 43.93 | 4.50 | 59.78 | 5:11.24 | 7704[1] |
| 3 |  Yonelvis Águila (CUB) |
11.16 | 7.06 | 13.77 | 2.01 | 50.24 | 14.89 | 47.04 | 3.70 | 63.01 | 4:49.93 | 7593 |
| 4 |  Santiago Lorenzo (ARG) |
11.31 | 6.89 | 13.57 | 1.83 | 49.94 | 15.18 | 40.98 | 4.70 | 58.68 | 4:42.37 | 7467 |
| 5 | Enrique Aguirre (ARG) |
11.06 | 7.00 | 13.51 | 1.98 | 50.20 | 15.17 | 39.93 | 4.20 | 52.12 | 4:49.47 | 7356 |
| — |  Octavius Gillespie (GUA) |
11.48 | 5.58 | 12.35 | 1.98 | — | — | — | — | — | — | DNF |
| — | Kip Janvrin (USA) |
11.28 | 6.75 | 14.07 | — | — | — | — | — | — | — | DNF |