The men's 100 metres event at the 1988 World Junior Championships in Athletics was held in Sudbury, Ontario, Canada, at Laurentian University Stadium on 27 and 28 July.
28 July
Wind: -2.8m/s
28 July
Wind: -1.5m/s
Wind: +0.8m/s
28 July
Wind: -2.9m/s
Wind: -2.2m/s
Wind: -2.3m/s
Wind: -1.8m/s
27 July
Wind: +1.5m/s
Wind: -1.0m/s
Wind: +0.9m/s
Wind: +1.4m/s
Wind: +1.0m/s
Wind: +0.6m/s
Wind: +1.2m/s
Wind: +0.6m/s
According to an unofficial count, 54 athletes from 41 countries participated in the event.