Donnie K. Von Hemel (born September 10, 1961 in Manter, Kansas) is a trainer of Thoroughbred racehorses. The son of trainer and brother to trainer , he obtained a degree in accounting from Fort Hays State University but in 1984 chose a training career. An Oklahoma Horse Racing Hall of Fame inductee, in 2011 Von Hemel won the richest race of his career when Caleb's Posse captured the $1 million Breeders' Cup Dirt Mile hosted that year by Churchill Downs.