| William Claypool | |
| Occupation: | Racehorse Trainer |
| Birth Place: | Andrew County, Missouri |
| Birth Date: | 16 July 1843 |
| Death Place: | Sacramento, California |
| Resting Place: | Masonic Lawn Cemetery, Sacramento, California |
| Race: | Emporium Stakes (1885) Hopeful Stakes (1885) September Stakes (1885) Stockton Stakes (1885) Withers Stakes (1885) American Classics wins: |
| Horses: | Ben Ali, Hidalgo, Philip S., Tyrant |
William Redman Claypool (July 16, 1843 – May 26, 1888) was a California based trainer of Thoroughbred racehorses who won the 1885 Belmont Stakes with the colt Tyrant for nationally prominent owner J. B. A. Haggin. A major racing event on the East Coast, the Belmont Stakes would become the third leg of the U.S. Triple Crown series. That same year Claypool trained the two-year-old colt Ben Ali who would go on to win the 1886 Kentucky Derby.
Just two years after his success on the East Coast, William Claypool died at age 44 from Consumption.[1]