Donald Peabody Ross (November 5, 1902 – October 11, 1973) was an American businessman who co-founded Delaware Park Racetrack in Stanton, Delaware and whose Brandywine Stable won the 1959 Preakness Stakes with it's colt, Greek Money. Another of the stables' top runners was the 1966 American Champion Older Dirt Female Horse, Open Fire.
Donald Ross was a steward of The Jockey Club, a president of the Thoroughbred Racing Association, and a founding member of the Board of Trustees of the National Museum of Racing and Hall of Fame.
In 1928 Donald Ross married Wihelmina H. Du Pont, daughter of William Kemble du Pont (1874-1907) and Ethel Fleet Hallock (1876-1951). The couple had a son and two daughters.