Lorenzo Bosisio (born 24 September 1944) is a retired Italian road and track cyclist. On the road he won a team bronze medal at the 1967 World Championships. Next year he had his best achievements on track, winning an Olympic bronze medal and a world title in the team pursuit, as well as a bronze medal in the individual pursuit at the world championships.
In 1969 Bosisio turned professional and won a silver medal in the individual pursuit at the 1970 World Championships. He had little success on the road, and retired in 1971.