2010 World Junior Championships in Athletics – Men's 100 metres

The men's 100 metres at the 2010 World Junior Championships in Athletics was held at the Moncton 2010 Stadium on 20 & 21 July.

Prior to the competition, the existing world junior and championship records were as follows.

No new records were established during the competition.

21 July
Wind: -0.7m/s

Key: PB = Personal best, SB = Seasonal best

21 July

Qual. rule: first 2 of each heat (Q) plus the 2 fastest times (q) qualified.

Wind: +2.6m/s

Wind: +2.2m/s

Wind: +0.9m/s

20 July

Wind: +2.2m/s

Wind: +1.3m/s

Wind: +0.8m/s

Wind: +0.4m/s

Wind: +1.0m/s

Wind: +0.2m/s

Wind: +1.3m/s

According to an unofficial count, 57 athletes from 46 countries participated in the event.