Alfred Masson Robertson (October 20, 1911 - September 4, 1975) was a Hall of Fame jockey in American Thoroughbred horse racing.

Alfred's mother's family emigrated to Toronto, Ontario, Canada, and her brother, Alexander Watson, was also involved in Thoroughbred racing.

The winner of a number of important races at tracks across the United States, Robertson had seven mounts in the Kentucky Derby with his best finish a third in 1937.

He retired from competitive riding the following year and in 1971 his career was honored with induction in the National Museum of Racing and Hall of Fame.

His grandson, Mark Robertson, is a graduate of the Juilliard School and a noted musician, producer and concertmaster.