The Boys' 100 metres at the 2009 World Youth Championships in Athletics was held at the Brixen-Bressanone Sport Arena on 8 and 9 July. [1] The event was won by Prezel Hardy of the United States. [2]
The Boys' 100 metres at the 2009 World Youth Championships in Athletics was held at the Brixen-Bressanone Sport Arena on 8 and 9 July. [1] The event was won by Prezel Hardy of the United States. [2]
| Gold | Silver | Bronze |
Prezel Hardy  | Aaron Brown  | Giovanni Galbieri  |
Prior to the competition, the following records were as follows.
| World Youth Best | | 10.23 | Indianapolis, USA | 21 June 2007 |
| Championship Record |  | 10.31 | Debrecen, Hungary | 13 July 2001 |
| World Youth Leading | | 10.34 | Waco, United States | 22 May 2009 |
 | Nara, Japan | 19 June 2009 |
No new records were set during the competition.
Qualification rule: first 2 of each heat (Q) plus the 4 fastest times (q) qualified.
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Qualification rule: first 4 of each heat (Q) qualified.
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 6 | Prezel Hardy | | 10.38 | Q |
| 2 | 5 | Ryota Yamagata | | 10.61 | Q |
| 3 | 4 | Huang Xiang | | 10.62 | Q |
| 4 | 3 | Moriba Morain | | 10.71 | Q |
| 5 | 7 | Richmond Collins |  | 10.73 | |
| 6 | 2 | Carlos Rodríguez |  | 10.84 | |
| 7 | 1 | Mateo Edward |  | 10.88 | |
| – | 8 | Ratu Tabakaucoro |  | DNS |
Key: PB = Personal best, SB = Seasonal best
Wind: 1.1 m/s
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 6 | Aaron Brown | | 10.49 | Q |
| 2 | 8 | Jimmy Vicaut |  | 10.56 | Q |
| 3 | 3 | Giovanni Galbieri | | 10.59 | Q |
| 4 | 5 | Takumi Kuki | | 10.61 | Q |
| 5 | 4 | Tan Juquan |  | 10.62 | |
| 6 | 7 | Kemar Bailey-Cole |  | 10.66 | |
| 7 | 2 | Geno Jones |  | 10.72 | |
| 8 | 1 | Jamol James | | 10.91 |
Key: PB = Personal best, SB = Seasonal best
Wind: 1.3 m/s
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
 | 6 | Prezel Hardy | | 10.57 | |
 | 5 | Aaron Brown | | 10.74 | |
 | 7 | Giovanni Galbieri | | 10.79 | |
| 4 | 4 | Ryota Yamagata | | 10.80 | |
| 5 | 8 | Huang Xiang | | 10.83 | |
| 6 | 1 | Takumi Kuki | | 10.88 | |
| 7 | 3 | Jimmy Vicaut | | 10.89 | |
| 8 | 2 | Moriba Morain | | 10.94 |
Key: PB = Personal best, SB = Seasonal best
Wind: −1.2 m/s
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