These are the official results of the men's decathlon competition at the 2003 World Championships in Athletics in Paris, France. With 20 participating athletes, including eight non-finishers, the competition is notable for having the lowest number of competitors in the World Championships history. The competition started on Monday 26 August 2003 and ended on Tuesday 27 August 2003.
| Gold |  Tom PappasUnited States (USA) | |
| Silver |  Roman ŠebrleCzech Republic (CZE) | |
| Bronze |  Dmitriy KarpovKazakhstan (KAZ) |
Monday, 26 August
Tuesday, 27 August
| 9026 | 27 May 2001 | ||||
| 8902 | 7 August 2001 |
| Rank | Athlete | Decathlon | Points | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||||
| 10.80 | 7.62 | 16.11 | 2.09 | 47.58 | 13.99 | 46.94 | 5.10 | 65.90 | 4:44.31 | 8750 | |||
| 11.00 | 7.64 | 15.47 | 2.06 | 47.90 | 14.25 | 47.47 | 4.80 | 69.79 | 4:34.45 | 8634 | |||
| 10.72 | 7.75 | 15.51 | 2.12 | 47.33 | 13.95 | 47.38 | 4.40 | 47.53 | 4:37.70 | 8374 | |||
| 4 | 11.03 | 7.28 | 15.95 | 1.94 | 50.04 | 14.15 | 45.47 | 4.50 | 67.10 | 4:27.63 | 8242 | ||
| 5 | 11.20 | 7.22 | 13.99 | 2.03 | 48.95 | 14.15 | 46.13 | 4.90 | 59.63 | 4:28.38 | 8218 | ||
| 6 | 10.99 | 7.08 | 15.43 | 1.97 | 49.54 | 14.36 | 48.36 | 5.00 | 56.50 | 4:34.63 | 8198 | ||
| 7 | 11.30 | 7.39 | 12.85 | 2.00 | 48.73 | 14.40 | 46.72 | 4.80 | 59.98 | 4:25.40 | 8126 | ||
| 8 | 11.19 | 7.21 | 13.87 | 1.97 | 49.95 | 14.50 | 42.68 | 5.10 | 57.55 | 4:28.84 | 8020 | ||
| 9 | 10.91 | 7.22 | 15.39 | 2.03 | 49.31 | 14.76 | 43.47 | 4.30 | 59.47 | 4:34.49 | 8000 | ||
| 10 | 11.10 | 6.98 | 13.89 | 1.97 | 48.98 | 14.98 | 42.70 | 4.50 | 62.69 | 4:24.68 | 7897 | ||
| 11 | 10.95 | 7.55 | 14.13 | 1.91 | 48.94 | 14.72 | 41.49 | 4.50 | 54.87 | 4:51.35 | 7753 | ||
| 12 | 10.99 | 7.14 | 15.30 | 2.03 | 48.75 | DSQ | 45.72 | 5.30 | 61.14 | 4:30.77 | 7503 | ||
| - | 11.16 | 7.22 | 15.21 | 2.06 | 50.49 | 14.28 | 44.59 | 4.90 | DNS | - | DNF | ||
| - | 11.46 | 6.69 | 14.57 | 1.94 | 51.63 | 14.54 | 36.21 | NM | DNS | - | DNF | ||
| - | 11.32 | 6.76 | 14.35 | 2.09 | 49.79 | DNS | - | - | - | - | DNF | ||
| - | 10.50 | 7.70 | 15.05 | 1.97 | DNF | - | - | - | - | - | DNF | ||
| - | 10.85 | 7.18 | 15.55 | 1.97 | DSQ | - | - | - | - | - | DNF | ||
| - | 10.83 | 6.96 | 13.13 | DNS | - | - | - | - | - | - | DNF | ||
| - | 11.09 | 6.78 | 14.14 | DNS | - | - | - | - | - | - | DNF | ||
| - | 11.11 | 6.15 | 15.29 | DNS | - | - | - | - | - | - | DNF | ||