Gregory "Greg" Speed (born 1970) is a US former wheelchair track and field athlete who competed in the 1992 Summer Paralympics in Barcelona, Spain. Speed broke the US national record in the 100m class T-4 race in 1990 IWAS World Games and the world record in the 4 × 100 m class T-4 relay race a year later. He is a member of the Southwest Chapter of the Olympians and Paralympians organization.