The women's javelin throw event at the 2000 World Junior Championships in Athletics was held in Santiago, Chile, at Estadio Nacional Julio Martínez Prádanos on 19 and 20 October.
| Gold | Jarmila Klimešová | |
| Silver | Inga Kožarenoka | |
| Bronze | Halina Kakhava |
20 October
| Rank | Name | Nationality | Attempts | Result | Notes | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||||
| align=left | align=left | | 48.88 | 50.51 | x | x | 52.17 | 54.82 | 54.82 | ||||
| align=left | align=left | 49.88 | 50.62 | 45.95 | x | 54.64 | 51.27 | 54.64 | |||||
| align=left | align=left | | 54.26 | 52.38 | 51.46 | 46.95 | 48.04 | x | 54.26 | ||||
| 4 | align=left | align=left |  | x | 51.74 | 53.59 | - | - | - | 53.59 | |||
| 5 | align=left | align=left |  | 50.96 | x | 49.74 | 48.77 | x | 53.12 | 53.12 | |||
| 6 | align=left | align=left | 51.52 | x | 47.90 | 50.12 | x | x | 51.52 | ||||
| 7 | align=left | align=left |  | 47.24 | 46.94 | 47.77 | 46.97 | 42.96 | 50.88 | 50.88 | |||
| 8 | align=left | align=left | 49.10 | 48.35 | 48.16 | 44.36 | 47.36 | 50.23 | 50.23 | ||||
| 9 | align=left | align=left | 46.16 | 41.66 | 46.68 | 46.68 | |||||||
| 10 | align=left | align=left | x | 46.47 | 39.86 | 46.47 | |||||||
| 11 | align=left | align=left | 41.63 | 46.10 | 45.38 | 46.10 | |||||||
| 12 | align=left | align=left | | x | 44.16 | 45.32 | 45.32 | ||||||
19 October
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | | 50.66 | 52.40 | - | 52.40 | Q | ||
| 2 | align=left | align=left | 52.13 | - | - | 52.13 | Q | |||
| 3 | align=left | align=left | | 51.43 | 51.56 | x | 51.56 | q | ||
| 4 | align=left | align=left | 51.09 | 51.32 | 51.15 | 51.32 | q | |||
| 5 | align=left | align=left | | 45.81 | 50.40 | 49.50 | 50.40 | q | ||
| 6 | align=left | align=left | 49.91 | 49.02 | 46.63 | 49.91 | q | |||
| 7 | align=left | align=left |  | 48.96 | 43.83 | 43.92 | 48.96 | |||
| 8 | align=left | align=left |  | 46.68 | 41.96 | 38.32 | 46.68 | |||
| 9 | align=left | align=left |  | x | 43.17 | 41.06 | 43.17 | |||
| 10 | align=left | align=left |  | x | x | 42.97 | 42.97 | |||
| 11 | align=left | align=left |  | 40.12 | 38.38 | 37.80 | 40.12 | |||
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | | 55.73 | - | - | 55.73 | Q | ||
| 2 | align=left | align=left | | 54.61 | - | - | 54.61 | Q | ||
| 3 | align=left | align=left | 54.58 | - | - | 54.58 | Q | |||
| 4 | align=left | align=left | | 50.29 | 50.76 | 50.29 | 50.76 | q | ||
| 5 | align=left | align=left | 49.48 | 45.90 | x | 49.48 | q | |||
| 6 | align=left | align=left | 49.40 | 46.02 | 49.16 | 49.40 | q | |||
| 7 | align=left | align=left | | 47.69 | 44.02 | 47.19 | 47.69 | |||
| 8 | align=left | align=left | x | 46.83 | 45.38 | 46.83 | ||||
| 9 | align=left | align=left |  | 44.40 | 43.86 | 44.83 | 44.83 | |||
| 10 | align=left | align=left |  | 37.10 | 35.17 | 42.14 | 42.14 | |||
According to an unofficial count, 21 athletes from 17 countries participated in the event.