The men's 100 metres at the 2010 World Junior Championships in Athletics was held at the Moncton 2010 Stadium on 20 & 21 July.
Records
Prior to the competition, the existing world junior and championship records were as follows. No new records were established during the competition. ==Results==
Results
Final 21 July Wind: -0.7 m/s Key: PB = Personal best, SB = Seasonal best Semifinals 21 July Qual. rule: first 2 of each heat (Q) plus the 2 fastest times (q) qualified. Semifinal 1 Wind: +2.6 m/s Semifinal 2 Wind: +2.2 m/s Semifinal 3 Wind: +0.9 m/s Heats 20 July Heat 1 Wind: +2.2 m/s Heat 2 Wind: +1.3 m/s Heat 3 Wind: +0.8 m/s Heat 4 Wind: +0.4 m/s Heat 5 Wind: +1.0 m/s Heat 6 Wind: +0.2 m/s Heat 7 Wind: +1.3 m/s Heat 8 Wind: +1.3 m/s ==Participation==
Participation
According to an unofficial count, 57 athletes from 46 countries participated in the event. ==References==