Guido Leoni (July 14, 1915 - May 6, 1951) was an Italian Grand Prix motorcycle road racer.
He won the 1951 125cc Spanish Grand Prix riding for the Mondial factory racing team.
[1] One month later, while competing in a race in Ferrara, Leoni was involved in a multiple-bike accident and was killed.
[2] He was posthumously awarded fifth place in the 1951 125cc world championship.
This Italian biographical article relating to motorcycle sport is a stub.