The women's javelin throw event at the 2008 World Junior Championships in Athletics was held in Bydgoszcz, Poland, at Zawisza Stadium on 8 and 10 July.
| Gold | Vira Rebryk | |
| Silver | Li Lingwei | |
| Bronze | Tatjana Jelača |
10 July
| Rank | Name | Nationality | Attempts | Result | Notes | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||||
| align=left | align=left | | 55.38 | 63.01 | - | x | - | 59.60 | 63.01 | ||||
| align=left | align=left | | 53.08 | x | 52.56 | 55.92 | 59.25 | 55.17 | 59.25 | ||||
| align=left | align=left | | 48.45 | x | 52.92 | 52.17 | 58.77 | 55.34 | 58.77 | ||||
| 4 | align=left | align=left | | 53.09 | 51.81 | 56.68 | 55.49 | 53.60 | 54.39 | 56.68 | |||
| 5 | align=left | align=left | 55.34 | 54.07 | 51.38 | 54.98 | x | 56.12 | 56.12 | ||||
| 6 | align=left | align=left |  | 50.39 | 55.26 | x | x | x | x | 55.26 | |||
| 7 | align=left | align=left |  | 48.86 | 51.44 | 51.58 | - | 49.51 | 54.12 | 54.12 | |||
| 8 | align=left | align=left |  | 53.94 | 48.66 | - | - | - | - | 53.94 | |||
| 9 | align=left | align=left |  | x | 51.15 | x | 51.15 | ||||||
| 10 | align=left | align=left | x | 51.12 | x | 51.12 | |||||||
| 11 | align=left | align=left |  | 50.87 | 49.20 | x | 50.87 | ||||||
| 12 | align=left | align=left |  | 45.63 | 48.39 | 46.83 | 48.39 | ||||||
8 July
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | | 46.93 | 54.48 | - | 54.48 | Q | ||
| 2 | align=left | align=left | | 46.94 | 49.61 | 52.05 | 52.05 | q | ||
| 3 | align=left | align=left | 43.27 | 51.69 | 48.44 | 51.69 | q | |||
| 4 | align=left | align=left | | 50.32 | 51.38 | 50.20 | 51.38 | q | ||
| 5 | align=left | align=left | | x | 51.38 | 47.61 | 51.38 | q | ||
| 6 | align=left | align=left |  | 49.79 | 40.81 | 50.53 | 50.53 | |||
| 7 | align=left | align=left |  | 49.77 | x | 49.67 | 49.77 | |||
| 8 | align=left | align=left |  | 47.53 | 45.86 | 47.98 | 47.98 | |||
| 9 | align=left | align=left | | x | x | 46.32 | 46.32 | |||
| 10 | align=left | align=left | 40.41 | 44.89 | 42.64 | 44.89 | ||||
| 11 | align=left | align=left |  | 41.29 | 41.96 | 44.41 | 44.41 | |||
| 12 | align=left | align=left | 44.06 | x | 37.87 | 44.06 | ||||
| 13 | align=left | align=left | x | 41.77 | 43.95 | 43.95 | ||||
| 14 | align=left | align=left | | 39.76 | 42.95 | 40.58 | 42.95 | |||
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | | 58.66 | - | - | 58.66 | Q | ||
| 2 | align=left | align=left | | 46.43 | x | 54.30 | 54.30 | Q | ||
| 3 | align=left | align=left | | 50.94 | 52.90 | 50.39 | 52.90 | q | ||
| 4 | align=left | align=left | | 51.55 | 48.49 | 43.53 | 51.55 | q | ||
| 5 | align=left | align=left | 51.43 | 45.65 | x | 51.43 | q | |||
| 6 | align=left | align=left | | x | 51.17 | 46.31 | 51.17 | q | ||
| 7 | align=left | align=left | | 45.21 | 50.98 | x | 50.98 | q | ||
| 8 | align=left | align=left |  | 48.76 | 49.00 | 45.90 | 49.00 | |||
| 9 | align=left | align=left |  | x | 48.33 | 44.10 | 48.33 | |||
| 10 | align=left | align=left |  | 46.87 | 46.69 | 41.01 | 46.87 | |||
| 11 | align=left | align=left | | 45.96 | 46.00 | x | 46.00 | |||
| 12 | align=left | align=left | 45.77 | 45.37 | x | 45.77 | ||||
| 13 | align=left | align=left | 45.73 | x | 43.24 | 45.73 | ||||
| 14 | align=left | align=left |  | 37.35 | 40.11 | 43.45 | 43.45 | |||
According to an unofficial count, 28 athletes from 23 countries participated in the event.