These are the official results of the men's decathlon competition at the 1983 World Championships in Helsinki, Finland. There were a total number of 25 participating athletes, including seven non-finishers. The competition was held from August 12 to August 13, 1983.
| Gold |  Daley ThompsonGreat Britain (GBR) | |
| Silver | Jürgen Hingsen West Germany (FRG) | |
| Bronze | Siegfried Wentz West Germany (FRG) |
Friday August 12
Saturday August 13
| Standing records prior to the 1983 World Athletics Championships | |||||
|---|---|---|---|---|---|
| 8779 | June 5, 1983 | ||||
| New Event | |||||
| 8779 | June 5, 1983 | ||||
| Rank | Athlete | Decathlon | Points | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||||
| 10.60 | 7.88 | 15.35 | 2.03 | 48.12 | 14.37 | 44.46 | 5.10 | 65.24 | 4:29.72 | 8666 | |||
| 10.95 | 7.75 | 15.66 | 2.00 | 48.08 | 14.36 | 43.30 | 4.90 | 67.42 | 4:21.59 | 8561 | |||
| 10.94 | 7.24 | 15.11 | 2.00 | 48.09 | 14.13 | 44.98 | 4.70 | 75.08 | 4:28.52 | 8478 | |||
| 4 | 11.05 | 7.43 | 15.25 | 2.00 | 48.23 | 14.89 | 48.64 | 4.80 | 70.48 | 4:28.61 | 8433 | ||
| 5 | 10.96 | 7.06 | 14.88 | 2.03 | 48.12 | 15.06 | 48.74 | 4.20 | 73.94 | 4:49.35 | 8212 | ||
| 6 | 11.07 | 7.20 | 14.90 | 2.00 | 49.35 | 14.63 | 49.08 | 4.20 | 64.50 | 4:19.90 | 8201 | ||
| 7 | 10.69 | 7.48 | 14.12 | 2.03 | 48.02 | 14.49 | 38.10 | 4.60 | 60.08 | 4:31.19 | 8167 | ||
| 8 | 11.18 | 7.26 | 16.14 | 1.91 | 48.97 | 14.61 | 46.98 | 4.50 | 64.54 | 4:32.56 | 8149 | ||
| 9 | 10.86 | 7.35 | 14.99 | 1.94 | 48.61 | 14.29 | 46.56 | 4.60 | 52.24 | 4:36.43 | 8096 | ||
| 10 | 11.17 | 7.29 | 13.77 | 2.00 | 49.84 | 15.33 | 43.90 | 4.70 | 62.00 | 4:26.05 | 7982 | ||
| 11 | 11.20 | 6.90 | 13.53 | 2.00 | 49.13 | 14.90 | 38.18 | 4.50 | 59.78 | 4:18.18 | 7827 | ||
| 12 | 11.36 | 6.70 | 12.73 | 1.97 | 49.46 | 14.76 | 42.28 | 4.60 | 59.70 | 4:18.92 | 7769 | ||
| 13 | 11.17 | 7.27 | 14.45 | 2.00 | 50.24 | 16.23 | 48.08 | 4.40 | 56.28 | 4:56.76 | 7639 | ||
| 14 | 11.41 | 6.64 | 14.80 | 1.91 | 51.55 | 15.00 | 41.70 | 4.40 | 60.08 | 4:36.94 | 7527 | ||
| 15 | 11.73 | 6.53 | 13.80 | 1.82 | 50.47 | 15.81 | 48.58 | 4.10 | 56.28 | 4:22.72 | 7356 | ||
| 16 | 11.55 | 6.99 | 13.33 | 1.85 | 51.01 | 15.01 | 39.28 | 4.00 | 58.46 | 4:29.25 | 7329 | ||
| 17 | 11.65 | 6.37 | 8.98 | 1.91 | 52.01 | 16.15 | 25.70 | 3.50 | 50.90 | 4:29.42 | 6239 | ||
| 18 | 11.80 | 6.47 | 10.76 | 1.67 | 53.13 | 16.65 | 33.70 | 3.40 | NM | 5:08.32 | 5332 | ||
| - | 11.11 | 7.23 | 13.95 | 2.06 | 49.49 | 14.72 | 42.10 | 4.30 | NM | DNS | DNF | ||
| - | 11.41 | 6.77 | 13.23 | 1.85 | 52.98 | 17.77 | 38.74 | 4.00 | DNS | DNF | |||
| - | 11.42 | 6.76 | 12.89 | 1.88 | 51.67 | DNF | 42.02 | DNS | DNF | ||||
| - | 11.02 | 7.44 | 13.73 | 1.94 | 49.43 | DNF | DNS | DNF | |||||
| - | 11.01 | 7.41 | 15.03 | NM | DNS | DNF | |||||||
| - | 11.39 | 6.83 | 13.61 | DNS | DNF | ||||||||
| - | 11.64 | 6.69 | NM | DNS | DNF | ||||||||