| | Event type
Javelin Throw, Boys
| Date | 13 – 16 October 2018 | |
|---|---|---|
| Status | YOG | |
| Location | Athletics Field, Parque Olímpico de la Juventud, Villa Soldati, Buenos Aires | |
| Participants | 17 from 17 countries | |
| Format | Two stages with final results determined by cumulative distance. | |
| Pos | Nr | Athlete | NOC | Distance | Stage One | Stage Two | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 | – | Topias Laine |  FIN | 153.42 | 74.57 (3) | 78.85 (1) | Gold | ||
| 2 | – | Gustavo Osorio |  ARG | 150.28 | 76.03 (2) | 74.25 (5) | Silver | ||
| 3 | – | Martin Florián |  CZE | 150.24 | 74.00 (5) | 76.24 (2) | Bronze | ||
| 4 | – | Ita Leshan |  KEN | 147.25 | 72.73 (7) | 74.52 (4) | |||
| 5 | – | Jean Mairongo |  ECU | 146.54 | 74.32 (4) | 72.22 (6) | |||
| 6 | – | Kunwer Ajai Rana |  IND | 146.51 | 71.45 (9) | 75.06 (3) | |||
| 7 | – | Ahmet Toyran |  TUR | 144.24 | 73.01 (6) | 71.23 (7) | |||
| 8 | – | Jano Esterhuizen |  RSA | 143.28 | 77.69 (1) | 65.59 (11) | |||
| 9 | – | Guilherme Moreira |  BRA | 141.53 | 72.56 (8) | 68.97 (9) | |||
| 10 | – | Răzvan Cărare |  ROU | 140.05 | 70.07 (10) | 69.98 (8) | |||
| 11 | – | Lenny Brisseault |  FRA | 132.21 | 66.61 (11) | 65.60 (10) | |||
| 12 | – | Kentaro Nakamura |  JPN | 130.86 | 66.31 (13) | 64.55 (12) | |||
| 13 | – | Gerasimos Kalogerakis |  GRE | 130.00 | 66.44 (12) | 63.56 (16) | |||
| 14 | – | David Schepp |  GER | 129.67 | 65.44 (14) | 64.23 (14) | |||
| 15 | – | Armando Caballero |  PAN | 128.19 | 63.74 (15) | 64.45 (13) | |||
| 16 | – | Marek Mucha |  POL | 125.02 | 61.43 (16) | 63.59 (15) | |||
| – | Abdulaziz Al-Hemdan |  KUW | – | – ( | – ( |