The men's decathlon event at the 1990 World Junior Championships in Athletics was held in Plovdiv, Bulgaria, at Deveti Septemvri Stadium on 8 and 9 August.[1] Senior implements (106.7 cm (3'6) hurdles, 7257g shot, 2 kg discus) were used.
| Gold | Eric Kaiser | |
| Silver | Jarkko Finni | |
| Bronze | David Bigham |
8/9 August
| Rank | Name | Nationality | 100m | LJ | SP | HJ | 400m | 110m H | DT | PV | JT | 1500m | Points | Notes | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| align=left | align=left | 11.01 (w: 0.4 m/s) | 7.50 | 12.82 | 2.03 | 49.30 | 14.30 (w: -0.2 m/s) | 40.28 | 4.10 | 58.12 | 4:40.66 | 7762 | |||||
| align=left | align=left | | 10.98 (w: 0.4 m/s) | 7.17 | 14.33 | 1.85 | 49.89 | 14.78 (w: -0.2 m/s) | 39.78 | 4.50 | 62.06 | 4:40.92 | 7698 | ||||
| align=left | align=left | 11.16 (w: 0.4 m/s) | 7.02 | 11.90 | 1.94 | 48.18 | 15.07 (w: -0.2 m/s) | 34.42 | 4.60 | 57.68 | 4:35.38 | 7488 | |||||
| 4 | align=left | align=left | 11.65 (w: 0.7 m/s) | 7.02 | 13.73 | 2.15 | 50.73 | 15.27 (w: -0.5 m/s) | 38.12 | 4.70 | 47.38 | 4:35.87 | 7384 | ||||
| 5 | align=left | align=left | 12.05 (w: 0.2 m/s) | 6.65 | 14.13 | 1.88 | 49.72 | 15.51 (w: -0.8 m/s) | 42.44 | 4.00 | 58.86 | 4:14.53 | 7323 | ||||
| 6 | align=left | align=left |  | 11.34 (w: 0.4 m/s) | 7.12 | 10.73 | 1.97 | 48.80 | 15.03 (w: -0.8 m/s) | 35.98 | 3.80 | 51.90 | 4:18.98 | 7232 | |||
| 7 | align=left | align=left |  | 11.39 (w: 0.2 m/s) | 6.85 | 12.47 | 2.00 | 48.56 | 15.11 (w: -0.2 m/s) | 34.62 | 4.40 | 42.94 | 4:32.40 | 7211 | |||
| 8 | align=left | align=left | 11.20 (w: 0.4 m/s) | 6.87 | 12.49 | 2.03 | 49.53 | 15.78 (w: -0.2 m/s) | 37.52 | 4.20 | 51.44 | 4:46.54 | 7198 | ||||
| 9 | align=left | align=left |  | 11.33 (w: 0.2 m/s) | 7.00 | 13.75 | 1.91 | 51.49 | 15.41 (w: -0.2 m/s) | 38.32 | 4.40 | 52.50 | 4:53.96 | 7169 | |||
| 10 | align=left | align=left | 11.04 (w: 0.2 m/s) | 6.99 | 12.03 | 1.97 | 47.97 | 15.49 (w: -0.2 m/s) | 35.24 | 3.70 | 45.94 | 4:26.65 | 7148 | ||||
| 11 | align=left | align=left | 11.51 (w: 0.4 m/s) | 6.63 | 12.98 | 2.03 | 51.75 | 15.60 (w: -0.5 m/s) | 38.52 | 4.30 | 45.58 | 4:44.90 | 6998 | ||||
| 12 | align=left | align=left |  | 11.72 (w: 0.2 m/s) | 6.54 | 12.09 | 1.88 | 54.11 | 16.13 (w: -0.2 m/s) | 38.72 | 4.80 | 56.54 | 4:56.05 | 6832 | |||
| 13 | align=left | align=left |  | 11.60 (w: 0.4 m/s) | 6.66 | 10.61 | 2.06 | 50.25 | 15.10 (w: -0.2 m/s) | 28.64 | 4.00 | 49.16 | 4:44.58 | 6770 | |||
| 14 | align=left | align=left |  | 11.31 (w: 0.4 m/s) | 6.63 | 11.07 | 1.79 | 50.27 | 16.58 (w: -0.2 m/s) | 35.86 | 4.30 | 58.96 | 4:52.45 | 6769 | |||
| 15 | align=left | align=left | 11.63 (w: 0.7 m/s) | 6.77 | 11.51 | 1.91 | 50.98 | 16.08 (w: -0.2 m/s) | 31.68 | 4.40 | 46.80 | 4:34.34 | 6765 | ||||
| 16 | align=left | align=left |  | 11.41 (w: 0.4 m/s) | 6.74 | 11.18 | 1.97 | 50.07 | 16.65 (w: -0.8 m/s) | 37.66 | 3.70 | 51.54 | 4:45.67 | 6737 | |||
| 17 | align=left | align=left | 11.46 (w: 0.4 m/s) | 6.70 | 11.86 | 1.88 | 50.58 | 15.00 (w: -0.2 m/s) | 32.20 | 3.70 | 52.36 | 4:51.93 | 6710 | ||||
| 18 | align=left | align=left | 11.31 (w: 0.2 m/s) | 6.86 | 11.21 | 1.88 | 50.54 | 15.13 (w: -0.8 m/s) | 33.28 | 4.00 | 44.78 | 4:54.02 | 6706 | ||||
| 19 | align=left | align=left | 11.36 (w: 0.4 m/s) | 6.74 | 12.08 | 1.91 | 51.90 | 16.69 (w: -0.8 m/s) | 38.56 | 4.00 | 51.56 | 5:06.70 | 6641 | ||||
| 20 | align=left | align=left | 11.33 (w: 0.7 m/s) | 6.50 | 14.71 | 1.88 | 50.01 | 16.40 (w: -0.5 m/s) | 40.08 | DNS | 48.12 | 4:34.96 | 6395 | ||||
| 21 | align=left | align=left | 11.55 (w: 0.4 m/s) | 6.54 | 11.45 | 1.94 | 52.87 | 15.77 (w: -0.2 m/s) | 29.44 | 3.80 | 49.76 | 5:12.89 | 6305 | ||||
| 22 | align=left | align=left | 11.62 (w: 0.7 m/s) | 6.60 | 12.52 | 2.00 | 55.92 | 16.27 (w: -0.5 m/s) | 32.12 | 4.10 | 50.28 | 5:31.01 | 6292 | ||||
| align=left | align=left | | 11.64 (w: 0.7 m/s) | 6.66 | 12.98 | 1.70 | 50.84 | 15.42 (w: -0.5 m/s) | 38.22 | 3.90 | DNS | DNS | DNF | ||||
| align=left | align=left | | 11.31 (w: 0.7 m/s) | 6.63 | 12.92 | DNS | DNS | DNS (w: -0.5 m/s) | DNS | DNS | DNS | DNS | DNF | ||||
| align=left | align=left | | 10.98 (w: 0.4 m/s) | 6.78 | DNS | DNS | DNS | DNS (w: -0.8 m/s) | DNS | DNS | DNS | DNS | DNF |
According to an unofficial count, 25 athletes from 17 countries participated in the event.