The men's decathlon event at the 2010 World Junior Championships in Athletics was held in Moncton, New Brunswick, Canada, at Moncton Stadium on 20 and 21 July. Junior implements were used, i.e. 99.0cm (3'3) hurdles, 6kg shot and 1.75kg discus.
20/21 July
According to an unofficial count, 26 athletes from 17 countries participated in the event.