Helge Lennart Jonsson (born 11 June 1933) is a retired Swedish sprinter. He competed in the 200 m and 4 × 400 m relay events at the 1960 Summer Olympics, but failed to reach the finals. He won a bronze medal in the relay at the 1958 European Athletics Championships, as well as the national titles in the 400 m (1959) and 4 × 400 m relay (1958 and 1959). After retiring from competitions he was treasurer of the Swedish Athletics Association for many years.