The men's decathlon event at the 2000 World Junior Championships in Athletics was held in Santiago, Chile, at Estadio Nacional Julio Martínez Prádanos on 18 and 19 October. Senior implements (106.7 cm (3'6) hurdles, 7257g shot, 2 kg discus) were used.
| Gold | Dennis Leyckes | |
| Silver | David Gómez | |
| Bronze | André Niklaus |
18/19 October
| Rank | Name | Nationality | 100m | LJ | SP | HJ | 400m | 110m H | DT | PV | JT | 1500m | Points | Notes | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| align=left | align=left | 10.98 (w: 1.6 m/s) | 7.22 | 13.46 | 1.95 | 47.59 | 14.61 (w: -0.1 m/s) | 39.52 | 4.80 | 54.76 | 4:33.10 | 7897 | |||||
| align=left | align=left | | 11.03 (w: -0.4 m/s) | 7.12 | 13.06 | 1.92 | 47.81 | 14.52 (w: -0.1 m/s) | 39.17 | 4.30 | 58.64 | 4:24.55 | 7772 | ||||
| align=left | align=left | 11.09 (w: 0.6 m/s) | 6.94 | 13.25 | 1.92 | 48.55 | 14.61 (w: -0.1 m/s) | 39.32 | 4.90 | 49.51 | 4:26.58 | 7712 | |||||
| 4 | align=left | align=left |  | 11.12 (w: 0.6 m/s) | 7.21 | 13.74 | 1.92 | 48.53 | 14.68 (w: -0.1 m/s) | 41.56 | 4.30 | 42.11 | 4:56.28 | 7366 | |||
| 5 | align=left | align=left |  | 11.14 (w: 1.6 m/s) | 6.30 | 12.65 | 1.92 | 50.63 | 14.86 (w: -0.1 m/s) | 35.89 | 4.60 | 55.95 | 4:43.16 | 7222 | |||
| 6 | align=left | align=left |  | 11.60 (w: 1.6 m/s) | 6.86 | 12.71 | 1.98 | 51.50 | 15.79 (w: 0.2 m/s) | 39.57 | 4.70 | 56.15 | 5:06.21 | 7131 | |||
| 7 | align=left | align=left | | 11.22 (w: -0.4 m/s) | 7.09 | 12.18 | 2.07 | 51.94 | 15.50 (w: -0.2 m/s) | 33.36 | 4.00 | 52.33 | 4:56.77 | 6998 | |||
| 8 | align=left | align=left | | 11.12 (w: -0.4 m/s) | 7.12 | 11.79 | 1.86 | 49.70 | 15.74 (w: 0.2 m/s) | 36.09 | 4.10 | 48.43 | 4:45.82 | 6979 | |||
| 9 | align=left | align=left |  | 11.43 (w: 0.6 m/s) | 6.70 | 12.12 | 1.92 | 49.89 | 15.85 (w: 0.2 m/s) | 35.22 | 3.90 | 57.36 | 4:39.00 | 6968 | |||
| 10 | align=left | Milan Kohout | align=left | | 11.40 (w: -0.4 m/s) | 6.48 | 10.45 | 1.98 | 51.06 | 15.69 (w: -0.2 m/s) | 30.66 | 4.60 | 47.50 | 4:21.26 | 6921 | ||
| 11 | align=left | align=left | 11.03 (w: 1.6 m/s) | 6.56 | 11.10 | 1.92 | 51.13 | 15.33 (w: -0.2 m/s) | 32.71 | 4.00 | 50.76 | 4:42.54 | 6820 | ||||
| 12 | align=left | align=left | 11.20 (w: -0.4 m/s) | 7.13 | 12.04 | 1.92 | 50.97 | 15.15 (w: -0.2 m/s) | 28.57 | 4.40 | 36.72 | 4:50.49 | 6781 | ||||
| 13 | align=left | align=left |  | 11.19 (w: 0.6 m/s) | 6.88 | 12.74 | 1.71 | 51.28 | 16.04 (w: -0.1 m/s) | 36.14 | 4.00 | 55.38 | 4:54.89 | 6755 | |||
| 14 | align=left | align=left |  | 11.64 (w: 0.6 m/s) | 6.72 | 12.31 | 1.89 | 52.20 | 16.19 (w: 0.2 m/s) | 37.65 | 4.20 | 53.24 | 5:10.86 | 6654 | |||
| 15 | align=left | align=left |  | 10.71 (w: 1.6 m/s) | 7.38 | 11.83 | 1.74 | 49.55 | 16.09 (w: -0.2 m/s) | 32.21 | 4.00 | 42.97 | 5:17.87 | 6633 | |||
| 16 | align=left | align=left | 11.09 (w: 0.6 m/s) | 7.03 | 13.24 | 1.74 | 51.25 | 16.17 (w: 0.2 m/s) | 32.93 | 3.50 | 48.96 | 4:56.76 | 6549 | ||||
| align=left | align=left | | 11.04 (w: -0.4 m/s) | 7.03 | 12.27 | 2.01 | 49.31 | 15.16 (w: -0.1 m/s) | 36.66 | 4.50 | 36.33 | DNS | DNF | ||||
| align=left | align=left |  | 11.06 (w: -0.4 m/s) | 6.74 | 12.29 | 1.86 | 49.39 | 15.39 (w: 0.2 m/s) | 41.66 | DNS | 52.42 | DNS | DNF | ||||
| align=left | align=left | 11.02 (w: 0.6 m/s) | 7.05 | 12.32 | 1.89 | DNS | DNS | DNS | DNS | DNS | DNS | DNF | |||||
| align=left | align=left | 10.54 (w: 1.6 m/s) | 5.87 | 12.46 | DNS | DNS | DNS | DNS | DNS | DNS | DNS | DNF |
According to an unofficial count, 20 athletes from 14 countries participated in the event.