The men's 200 metres at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 12 and 13 July.[1]
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Delano Williams | Aaron Ernest | Tyreek Hill |
, the existing world junior and championship records were as follows.
| World Junior Record | 19.93 | Devonshire, Bermuda | 11 April 2004 | ||
| Championship Record | 20.28 | Grosseto, Italy | 16 July 2004 | ||
| World Junior Leading | 20.14 | Orlando, United States | 26 May 2012 |
Qualification: The first 2 of each heat (Q) and the 8 fastest times (q) qualified
| Rank | Heat | Lane | Name | Nationality | Time | Note | |
|---|---|---|---|---|---|---|---|
| 1 | 6 | 5 | 20.66 | Q | |||
| 2 | 8 | 5 | 20.76 | Q | |||
| 3 | 4 | 7 | 20.78 | Q | |||
| 4 | 4 | 9 | 20.79 | Q, PB | |||
| 5 | 1 | 8 | 20.86 | Q | |||
| 6 | 8 | 7 | 20.89 | Q, SB | |||
| 7 | 6 | 7 | 20.90 | Q, NR | |||
| 8 | 1 | 2 | 20.95 | Q, PB | |||
| 9 | 4 | 3 | 20.98 | q, PB | |||
| 10 | 2 | 5 | 21.01 | Q | |||
| 11 | 5 | 9 | Siphelo Ngquboza | 21.04 | Q | ||
| 12 | 3 | 5 | 21.07 | Q | |||
| 13 | 2 | 7 | 21.10 | Q | |||
| 14 | 5 | 4 | 21.12 | Q | |||
| 15 | 8 | 9 | 21.19 | q | |||
| 16 | 4 | 2 | 21.19 | q | |||
| 17 | 1 | 9 | 21.20 | q | |||
| 18 | 6 | 2 | 21.24 | q | |||
| 19 | 3 | 4 | 21.25 | Q | |||
| 20 | 7 | 7 | 21.29 | Q | |||
| 21 | 6 | 3 | 21.30 | q | |||
| 22 | 5 | 8 | 21.31 | q, PB | |||
| 23 | 2 | 6 | 21.33 | q, SB | |||
| 24 | 3 | 8 | 21.34 | ||||
| 24 | 8 | 3 | 21.34 | ||||
| 26 | 7 | 3 | 21.35 | Q | |||
| 27 | 3 | 9 | 21.36 | ||||
| 28 | 8 | 8 | 21.38 | PB | |||
| 29 | 2 | 2 | 21.41 | ||||
| 30 | 3 | 2 | 21.46 | ||||
| 31 | 1 | 7 | 21.47 | ||||
| 31 | 4 | 5 | 21.47 | ||||
| 33 | 1 | 8 | 21.50 | ||||
| 33 | 1 | 5 | 21.50 | ||||
| 35 | 7 | 6 | 21.53 | ||||
| 36 | 2 | 3 | 21.57 | ||||
| 37 | 7 | 2 | 21.58 | ||||
| 37 | 5 | 8 | 21.58 | ||||
| 37 | 7 | 8 | 21.58 | ||||
| 40 | 1 | 3 | 21.61 | NJR | |||
| 41 | 5 | 5 | 21.62 | ||||
| 42 | 5 | 7 | 21.62 | ||||
| 43 | 2 | 8 | 21.65 | ||||
| 44 | 6 | 4 | 21.71 | ||||
| 44 | 3 | 6 | 21.71 | ||||
| 44 | 6 | 9 | 21.71 | ||||
| 47 | 4 | 7 | 21.80 | ||||
| 47 | 4 | 2 | 21.80 | ||||
| 49 | 5 | 3 | 21.81 | ||||
| 49 | 5 | 2 | 21.81 | ||||
| 51 | 8 | 2 | 21.92 | ||||
| 52 | 6 | 6 | 21.96 | SB | |||
| 53 | 8 | 4 | 21.98 | SB | |||
| 54 | 8 | 6 | 22.16 | ||||
| 55 | 3 | 3 | 22.19 | ||||
| 56 | 7 | 9 | 22.22 | PB | |||
| 57 | 4 | 7 | 22.29 | PB | |||
| 58 | 2 | 4 | 22.73 | ||||
| 59 | 8 | 1 | 23.97 | PB | |||
| 60 | 7 | 5 | 23.98 | PB | |||
| 61 | 1 | 4 | 26.00 | ||||
| 6 | 8 | DSQ | |||||
| 7 | 1 | DNS | |||||
| 2 | 9 | DNS | |||||
| 7 | 4 | DNS | |||||
| 3 | 7 | DNS |
Qualification: The first 2 of each heat (Q) and the 2 fastest times (q) qualified
| Rank | Heat | Lane | Name | Nationality | Time | Note | |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 5 | 20.83 | Q | |||
| 2 | 3 | 6 | 20.85 | Q | |||
| 3 | 2 | 6 | 20.93 | Q, PB | |||
| 4 | 2 | 4 | 20.94 | Q | |||
| 5 | 3 | 7 | 21.00 | Q | |||
| 6 | 1 | 7 | 21.06 | Q | |||
| 6 | 1 | 4 | 21.06 | q | |||
| 6 | 3 | 4 | 21.06 | q | |||
| 9 | 1 | 9 | 21.14 | ||||
| 10 | 3 | 5 | 21.20 | ||||
| 11 | 2 | 9 | 21.24 | ||||
| 11 | 2 | 5 | Siphelo Ngquboza | 21.24 | |||
| 13 | 1 | 8 | 21.27 | ||||
| 14 | 2 | 7 | 21.27 | ||||
| 15 | 1 | 3 | 21.36 | ||||
| 16 | 3 | 8 | 21.45 | ||||
| 17 | 3 | 3 | 21.46 | ||||
| 18 | 3 | 2 | 21.57 | ||||
| 19 | 2 | 8 | 21.58 | ||||
| 20 | 3 | 9 | 21.63 | ||||
| 21 | 2 | 2 | 21.72 | ||||
| 22 | 2 | 3 | 21.82 | ||||
| 1 | 6 | DNS | |||||
| 1 | 2 | DNS |
Wind: -0.4 m/s
| Rank | Lane | Name | Nationality | Time | Note | |
|---|---|---|---|---|---|---|
| 6 | 20.48 | NJ | ||||
| 5 | 20.53 | PB | ||||
| 4 | 20.54 | |||||
| 4 | 7 | 20.54 | NJ | |||
| 5 | 3 | 20.66 | ||||
| 6 | 9 | 20.69 | PB | |||
| 7 | 8 | 20.99 | ||||
| 8 | 2 | 21.00 |
According to an unofficial count, 62 athletes from 48 countries participated in the event.