The men's 100 metres event at the 2016 IAAF World U20 Championships was held at Zdzisław Krzyszkowiak Stadium on 19 and 20 July.
| Gold | Noah Lyles | |
| Silver | Filippo Tortu | |
| Bronze | Mario Burke |
| Standing records prior to the 2016 IAAF World U20 Championships in Athletics | |||||
|---|---|---|---|---|---|
| World Junior Record | 9.97 | Eugene, Oregon, United States | 13 June 2014 | ||
| Championship Record | 10.05 | Barcelona, Spain | 11 July 2012 | ||
| World Junior Leading | 10.04 | Norwalk, California, United States | 15 April 2016 | ||
Qualification: First 3 of each heat (Q) and the 6 fastest times (q) qualified for the semifinals.[1]
Wind:
Heat 1: -0.4 m/s, Heat 2: +0.6 m/s, Heat 3: +0.7 m/s, Heat 4: +0.4 m/s, Heat 5: +0.6 m/s, Heat 6: -0.6 m/s
| Rank | Heat | Name | Nationality | Time | Note | |
|---|---|---|---|---|---|---|
| 1 | 3 | 10.10 | Q | |||
| 2 | 4 | 10.29 | Q | |||
| 3 | 2 | 10.31 | Q | |||
| 4 | 5 | 10.32 | Q | |||
| 5 | 6 | 10.33 | Q | |||
| 6 | 3 | 10.34 | Q | |||
| 7 | 3 | 10.39 | Q, PB | |||
| 8 | 6 | 10.44 | Q, SB | |||
| 9 | 2 | 10.44 | Q | |||
| 10 | 5 | 10.44 | Q | |||
| 11 | 6 | 10.45 | Q | |||
| 12 | 4 | 10.46 | Q, SB | |||
| 13 | 2 | 10.47 | Q | |||
| 14 | 1 | 10.48 | Q | |||
| 15 | 3 | 10.50 | q | |||
| 16 | 1 | 10.52 | Q | |||
| 17 | 2 | 10.54 | q | |||
| 18 | 5 | 10.55 | Q | |||
| 18 | 3 | 10.55 | q | |||
| 20 | 5 | 10.56 | q | |||
| 21 | 4 | 10.58 | Q | |||
| 22 | 4 | 10.58 | q | |||
| 23 | 1 | 10.61 | Q | |||
| 24 | 3 | 10.65 | q | |||
| 25 | 4 | 10.66 | ||||
| 26 | 2 | 10.67 | ||||
| 27 | 5 | 10.69 | ||||
| 28 | 5 | 10.70 | ||||
| 29 | 1 | 10.79 | ||||
| 30 | 2 | 10.84 | ||||
| 31 | 6 | 10.87 | ||||
| 32 | 1 | 10.88 | ||||
| 33 | 6 | 10.93 | SB | |||
| 34 | 6 | 10.96 | ||||
| 35 | 4 | 11.05 | ||||
| 36 | 5 | 11.25 | ||||
| 37 | 1 | 11.30 | ||||
| 38 | 1 | 11.99 | ||||
| 2 | ||||||
| 2 | ||||||
| 3 | ||||||
| 4 | ||||||
| 6 |
Qualification: First 2 of each heat (Q) and the 2 fastest times (q) qualified for the final.[2]
Wind:
Heat 1: -0.6 m/s, Heat 2: +0.2 m/s, Heat 3: +0.7 m/s
| Rank | Heat | Name | Nationality | Time | Note | |
|---|---|---|---|---|---|---|
| 1 | 3 | 10.20 | Q | |||
| 2 | 2 | 10.22 | Q | |||
| 3 | 1 | 10.26 | Q | |||
| 4 | 3 | 10.32 | Q | |||
| 5 | 1 | 10.34 | Q | |||
| 6 | 1 | 10.36 | q | |||
| 7 | 2 | 10.37[3] | Q | |||
| 8 | 3 | 10.37[4] | q | |||
| 9 | 2 | 10.37[5] | PB | |||
| 10 | 3 | 10.40 | ||||
| 11 | 1 | 10.43 | SB | |||
| 12 | 2 | 10.45 | ||||
| 13 | 1 | 10.47 | ||||
| 14 | 2 | 10.53 | ||||
| 15 | 1 | 10.53 | ||||
| 16 | 3 | 10.53 | ||||
| 17 | 3 | 10.54 | ||||
| 18 | 2 | 10.56 | ||||
| 19 | 2 | 10.58 | ||||
| 19 | 3 | 10.58 | ||||
| 21 | 3 | 10.58 | ||||
| 22 | 1 | 10.63 | ||||
| 23 | 1 | 10.65 | ||||
| 24 | 2 | 10.73 |
Wind: +0.2 m/s[6]
| Rank | Lane | Name | Nationality | Time | Note | |
|---|---|---|---|---|---|---|
| 6 | 10.17 | |||||
| 7 | 10.24 | |||||
| 8 | 10.26 | |||||
| 4 | 4 | 10.28 | ||||
| 5 | 5 | 10.29 | ||||
| 6 | 2 | 10.30 | ||||
| 7 | 9 | 10.37 | ||||
| 8 | 3 | 16.18 |