The women's 800 metres event at the 2002 World Junior Championships in Athletics was held in Kingston, Jamaica, at National Stadium on 17 and 19 July.
| Gold | Janeth Jepkosgei | |
| Silver | Lucia Klocová | |
| Bronze | Juliana de Azevedo |
19 July
| Rank | Name | Nationality | Time | Notes | |||
|---|---|---|---|---|---|---|---|
| align=left | align=left | | 2:00.80 | ||||
| align=left | align=left | | 2:01.73 | ||||
| align=left | align=left | | 2:03.81 | ||||
| 4 | align=left | align=left | 2:04.11 | ||||
| 5 | align=left | align=left |  | 2:04.44 | |||
| 6 | align=left | align=left | 2:05.49 | ||||
| 7 | align=left | align=left |  | 2:08.36 | |||
| 8 | align=left | align=left |  | 2:11.08 |
17 July
| Rank | Name | Nationality | Time | Notes | |||
|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | | 2:06.20 | Q | ||
| 2 | align=left | align=left | | 2:06.23 | Q | ||
| 3 | align=left | align=left |  | 2:06.60 | |||
| 4 | align=left | align=left |  | 2:06.97 | |||
| 5 | align=left | align=left |  | 2:16.61 | |||
| 6 | align=left | align=left |  | 2:22.14 |
| Rank | Name | Nationality | Time | Notes | |||
|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | | 2:04.51 | Q | ||
| 2 | align=left | align=left | | 2:05.18 | Q | ||
| 3 | align=left | align=left | 2:05.60 | q | |||
| 4 | align=left | align=left | | 2:06.51 | q | ||
| 5 | align=left | align=left |  | 2:07.90 | |||
| align=left | align=left |  | DNF |
| Rank | Name | Nationality | Time | Notes | |||
|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | | 2:06.76 | Q | ||
| 2 | align=left | align=left | 2:07.11 | Q | |||
| 3 | align=left | align=left | 2:08.17 | ||||
| 4 | align=left | align=left | | 2:09.40 | |||
| 5 | align=left | align=left | 2:09.77 | ||||
| 6 | align=left | align=left |  | 2:10.19 | |||
| 7 | align=left | align=left | | 2:10.82 |
According to an unofficial count, 19 athletes from 17 countries participated in the event.