The women's long jump event at the 1988 World Junior Championships in Athletics was held in Sudbury, Ontario, Canada, at Laurentian University Stadium on 29 and 30 July.
| Gold | Fiona May | |
| Silver | Anu Kaljurand | |
| Bronze | Joanne Wise |
30 July
| Rank | Name | Nationality | Attempts | Result | Notes | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||||
| align=left | align=left | 6.77 (w: +1.2 m/s) | 6.88 w (w: +2.1 m/s) | x | 6.75 w (w: +2.4 m/s) | 6.82 (w: +1.7 m/s) | 6.83 w (w: +3.0 m/s) | 6.88 w (w: +2.1 m/s) | |||||
| align=left | align=left | 6.78 w (w: +3.3 m/s) | x | 6.41 w (w: +3.2 m/s) | x | 6.37 (w: +1.8 m/s) | x | 6.78 w (w: +3.3 m/s) | |||||
| align=left | align=left | 6.47 (w: +1.7 m/s) | 6.69 w (w: +4.6 m/s) | 6.14 w (w: +3.7 m/s) | 6.40 w (w: +2.1 m/s) | x | 6.38 w (w: +3.7 m/s) | 6.69 w (w: +4.6 m/s) | |||||
| 4 | align=left | align=left |  | 6.26 w (w: +3.6 m/s) | x | x | 6.37 w (w: +3.0 m/s) | 6.28 w (w: +2.3 m/s) | 6.06 w (w: +3.1 m/s) | 6.37 w (w: +3.0 m/s) | |||
| 5 | align=left | align=left | 6.32 w (w: +3.8 m/s) | 6.14 w (w: +2.2 m/s) | 6.13 w (w: +3.2 m/s) | x | 6.20 w (w: +2.7 m/s) | x | 6.32 w (w: +3.8 m/s) | ||||
| 6 | align=left | align=left | | 6.18 w (w: +3.8 m/s) | 6.26 w (w: +3.0 m/s) | 6.19 w (w: +3.6 m/s) | 6.18 w (w: +5.7 m/s) | x | 5.62 (w: +1.1 m/s) | 6.26 w (w: +3.0 m/s) | |||
| 7 | align=left | align=left |  | 6.03 (w: +1.3 m/s) | x | 6.22 w (w: +3.8 m/s) | x | x | x | 6.22 w (w: +3.8 m/s) | |||
| 8 | align=left | align=left |  | 6.09 w (w: +2.8 m/s) | x | x | 5.93 w (w: +3.2 m/s) | 5.85 w (w: +2.4 m/s) | 6.13 (w: +1.8 m/s) | 6.13 (w: +1.8 m/s) | |||
| 9 | align=left | align=left | | 5.81 w (w: +2.9 m/s) | 6.05 w (w: +2.1 m/s) | 5.79 w (w: +3.1 m/s) | 6.05 w (w: +2.1 m/s) | ||||||
| 10 | align=left | align=left |  | 6.02 (w: +1.8 m/s) | 3.80 w (w: +2.9 m/s) | x | 6.02 (w: +1.8 m/s) | ||||||
| 11 | align=left | align=left |  | x | 6.00 w (w: +2.9 m/s) | x | 6.00 w (w: +2.9 m/s) | ||||||
| 12 | align=left | align=left |  | 5.76 (w: +1.9 m/s) | 5.83 w (w: +2.5 m/s) | 5.81 w (w: +2.6 m/s) | 5.83 w (w: +2.5 m/s) | ||||||
29 Jul
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | | 6.17 (w: +1.9 m/s) | 6.09 (w: +1.3 m/s) | x | 6.17 (w: +1.9 m/s) | q | ||
| 2 | align=left | align=left | | x | 6.10 (w: +1.1 m/s) | x | 6.10 (w: +1.1 m/s) | q | ||
| 3 | align=left | align=left | | 6.04 w (w: +2.5 m/s) | 6.08 (w: +1.8 m/s) | 6.08 w (w: +2.5 m/s) | 6.08 (w: +1.8 m/s) | q | ||
| 4 | align=left | align=left | x | x | 6.04 w (w: +2.3 m/s) | 6.04 w (w: +2.3 m/s) | q | |||
| 5 | align=left | align=left | x | 5.65 (w: +1.2 m/s) | 5.96 (w: +0.9 m/s) | 5.96 (w: +0.9 m/s) | ||||
| 6 | align=left | align=left |  | x | 5.94 (w: +1.3 m/s) | 5.66 (w: +1.2 m/s) | 5.94 (w: +1.3 m/s) | |||
| 7 | align=left | align=left |  | 5.57 (w: +0.9 m/s) | 5.72 (w: +0.2 m/s) | 5.93 (w: +1.4 m/s) | 5.93 (w: +1.4 m/s) | |||
| 8 | align=left | align=left | x | x | 5.92 (w: +2.0 m/s) | 5.92 (w: +2.0 m/s) | ||||
| 9 | align=left | align=left |  | 5.89 (w: NWI) | x | 5.88 w (w: +2.2 m/s) | 5.89 (w: NWI) | |||
| 10 | align=left | align=left | 5.68 w (w: +2.9 m/s) | 5.73 (w: +1.8 m/s) | 5.32 (w: -0.3 m/s) | 5.73 (w: +1.8 m/s) | ||||
| 11 | align=left | align=left | 5.24 w (w: +2.9 m/s) | 4.98 (w: +0.9 m/s) | 5.67 (w: +1.8 m/s) | 5.67 (w: +1.8 m/s) | ||||
| 12 | align=left | align=left |  | 5.57 (w: +0.4 m/s) | 5.59 (w: +2.0 m/s) | 5.66 (w: +1.5 m/s) | 5.66 (w: +1.5 m/s) | |||
| 13 | align=left | align=left | x | 5.48 (w: +1.8 m/s) | 5.10 (w: +1.4 m/s) | 5.48 (w: +1.8 m/s) | ||||
| 14 | align=left | align=left | 4.30 (w: NWI) | 5.08 (w: +1.5 m/s) | 4.79 (w: +0.8 m/s) | 5.08 (w: +1.5 m/s) | ||||
| align=left | align=left |  | x | x | x | NM | ||||
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | x | 6.54 (w: +0.7 m/s) | - | 6.54 (w: +0.7 m/s) | Q | |||
| 2 | align=left | align=left | x | x | 6.34 (w: +1.4 m/s) | 6.34 (w: +1.4 m/s) | Q | |||
| 3 | align=left | align=left | | x | 6.22 (w: +0.3 m/s) | 6.14 w (w: +2.6 m/s) | 6.22 (w: +0.3 m/s) | q | ||
| 4 | align=left | align=left | 6.03 (w: +0.5 m/s) | x | 6.20 (w: +1.0 m/s) | 6.20 (w: +1.0 m/s) | q | |||
| 5 | align=left | align=left | | x | 5.75 (w: +0.6 m/s) | 6.18 w (w: +2.9 m/s) | 6.18 w (w: +2.9 m/s) | q | ||
| 6 | align=left | align=left | | x | 5.87 (w: +1.0 m/s) | 6.13 w (w: +3.2 m/s) | 6.13 w (w: +3.2 m/s) | q | ||
| 7 | align=left | align=left | | 5.81 (w: +0.7 m/s) | 6.05 (w: +1.3 m/s) | 5.90 w (w: +3.5 m/s) | 6.05 (w: +1.3 m/s) | q | ||
| 8 | align=left | align=left | | 5.96 (w: +0.9 m/s) | x | 5.99 (w: +1.1 m/s) | 5.99 (w: +1.1 m/s) | q | ||
| 9 | align=left | align=left |  | 5.69 w (w: +2.1 m/s) | 5.61 (w: +1.0 m/s) | 5.98 (w: +1.3 m/s) | 5.98 (w: +1.3 m/s) | |||
| 10 | align=left | align=left | | 5.91 (w: +0.8 m/s) | x | 5.90 (w: +1.6 m/s) | 5.91 (w: +0.8 m/s) | |||
| 11 | align=left | align=left | | 5.75 (w: +1.3 m/s) | x | 5.28 (w: +0.9 m/s) | 5.75 (w: +1.3 m/s) | |||
| 12 | align=left | align=left | x | x | 5.54 (w: +0.7 m/s) | 5.54 (w: +0.7 m/s) | ||||
| 13 | align=left | align=left |  | 4.80 (w: +0.8 m/s) | 5.17 (w: +1.3 m/s) | x | 5.17 (w: +1.3 m/s) | |||
| 14 | align=left | align=left |  | 5.12 (w: +0.8 m/s) | 4.96 (w: +1.4 m/s) | x | 5.12 (w: +0.8 m/s) | |||
According to an unofficial count, 29 athletes from 22 countries participated in the event.