The women's 100 metres event at the 2008 World Junior Championships in Athletics was held in Bydgoszcz, Poland, at Zawisza Stadium on 8 and 9 July.
Medalists
Results
Final
9 July
Wind: -0.6 m/s
Semifinals
8 July
Semifinal 1
Wind: 0.0 m/s
Semifinal 2
Wind: -0.7 m/s
Semifinal 3
Wind: -0.5 m/s
Heats
8 July
Heat 1
Wind: -1.9 m/s
Heat 2
Wind: -0.1 m/s
Heat 3
Wind: -1.9 m/s
Heat 4
Wind: -3.3 m/s
Heat 5
Wind: -0.8 m/s
Heat 6
Wind: -1.2 m/s
Heat 7
Wind: -1.6 m/s
Heat 8
Wind: -1.9 m/s
Participation
According to an unofficial count, 65 athletes from 45 countries participated in the event.