| Event: | Boys' long jump |
| Games: | 2018 Summer Youth |
| Venue: | Parque Polideportivo Roca |
| Date: | 12, 15 October |
| Competitors: | 16 |
| Nations: | 16 |
| Gold: | Lester Lescay |
| Goldnoc: | CUB |
| Silver: | Joshua Cowley |
| Silvernoc: | AUS |
| Bronze: | Koki Wada |
| Bronzenoc: | JPN |
| Prev: | 2014 |
| Next: | 2026 |
The boys' long jump competition at the 2018 Summer Youth Olympics was held on 12 and 15 October, at the Parque Polideportivo Roca.
All times are in local time (UTC-3).
| Date | Time | Round | ||||
|---|---|---|---|---|---|---|
| 12 October 2018 | 15:20 | Stage 1 | ||||
| style=background:lemonchiffon | 15 October 2018 | style=background:lemonchiffon | 15:10 | style=background:lemonchiffon | Stage 2 |
| Rank | Athlete | Nation | 1 | 2 | 3 | 4 | Result | Notes | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Joshua Cowley | 7.69* | 7.52w | 7.71w | 7.53 | 7.71w | |||
| 2 | Lester Lescay | 7.25 | 7.42w | 7.25 | 7.65 | 7.65 | |||
| 3 | Jason Donavan Tito | 7.59 | 7.54 | 7.35 | 7.59 | ||||
| 4 | Koki Wada | 7.30w | 7.41 | 7.46w | 7.29 | 7.46w | |||
| 5 | Malcolm Clemons | 7.37 | 7.23w | 7.46w | 7.46w | ||||
| 6 | Adrian Henrique Vieira | 5.78w | 7.37 | 7.42 | 7.44w | 7.44w | |||
| 7 | Davide Favro | 6.89 | 7.10 | 7.16w | 7.18 | 7.18 | |||
| 8 | Nick Schmahl | 7.13 | 3.20 | 7.13 | |||||
| 9 | Bruno Yoset | 7.05w | 6.99 | 7.05w | |||||
| 10 | Kirill Sots | 6.95 | 6.86 | 7.03w | 7.03w | ||||
| 11 | Tomáš Kratochvíl | 7.00 | 4.86 | 7.02 | 6.83 | 7.02 | |||
| 12 | Navaro Doulany Aboikonie | 6.98 | 6.68 | 6.62 | 6.99 | 6.99 | |||
| 13 | Leo Lasch | 6.99 | 6.98 | 6.99 | |||||
| 14 | Bryan Mucret | 6.93 | 6.16 | 6.65 | 6.80 | 6.93 | |||
| 15 | Shacquille Lowe | 6.77 | 6.79w | 6.83 | 6.83 | ||||
| 16 | Wen Hua-yu | 6.75 | 6.75 |
| Rank | Athlete | Nation | 1 | 2 | 3 | 4 | Result | Notes | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Lester Lescay | 7.62w | 7.89w | 5.77w | 5.31w | 7.89w | |||
| 2 | Joshua Cowley | 7.52w | 7.82 | 7.80w | 7.45w | 7.82 | |||
| 3 | Koki Wada | 7.55w | 7.42w | 7.51w | 7.66w | 7.66w | |||
| 4 | Adrian Henrique Vieira | 7.50w | 7.50w | 7.50w | 7.50w | ||||
| 5 | Nick Schmahl | 7.03w | 7.04w | 7.27w | 7.27w | ||||
| 6 | Kirill Sots | 7.23w | 7.12w | 7.23w | |||||
| 7 | Shacquille Lowe | 7.22w | 7.14w | 7.07w | 6.87w | 7.22w | |||
| 8 | Davide Favro | 7.11w | 6.90w | 7.11w | |||||
| 9 | Bruno Yoset | 6.96w | 6.79w | 7.03w | 7.03w | ||||
| 10 | Tomáš Kratochvíl | 6.94w | 6.97w | 5.37w | 6.97w | ||||
| 11 | Leo Lasch | 6.95w | 6.66w | 6.95w | |||||
| 12 | Navaro Doulany Aboikonie | 6.91w | 6.59 | 6.59 | 6.91w | ||||
| 13 | Bryan Mucret | 6.87w | 6.83w | 6.69w | 6.64w | 6.87w | |||
| Jason Donavan Tito | |||||||||
| Malcolm Clemons | |||||||||
| Wen Hua-yu |
| Rank | Athlete | Nation | Stage 1 | Stage 2 | Total | |
|---|---|---|---|---|---|---|
| Lester Lescay | 7.65 | 7.89 | 15.54 | |||
| Joshua Cowley | 7.71 | 7.82 | 15.53 | |||
| Koki Wada | 7.46 | 7.66 | 15.12 | |||
| Adrian Henrique Vieira | 7.44 | 7.50 | 14.94 | |||
| Nick Schmahl | 7.13 | 7.27 | 14.40 | |||
| Davide Favro | 7.18 | 7.11 | 14.29 | |||
| Kirill Sots | 7.03 | 7.23 | 14.26 | |||
| Bruno Yoset | 7.05 | 7.03 | 14.08 | |||
| Shacquille Lowe | 6.83 | 7.22 | 14.05 | |||
| 10 | Tomáš Kratochvíl | 7.02 | 6.97 | 13.99 | ||
| 11 | Leo Lasch | 6.99 | 6.95 | 13.94 | ||
| 12 | Navaro Doulany Aboikonie | 6.99 | 6.91 | 13.90 | ||
| 13 | Bryan Mucret | 6.93 | 6.87 | 13.80 | ||
| 14 | Jason Donavan Tito | 7.59 | 7.59 | |||
| Malcolm Clemons | 7.46 | |||||
| Wen Hua-yu | 6.75 |