| William Horton Sr. | |
| Sport: | Sailing |
| Birth Date: | 18 December 1909 |
| Birth Place: | Los Angeles, California, United States |
| Death Place: | San Clemente, California, United States |
William Horton Sr. (December 18, 1909 - June 26, 1973) was an American sailor. He competed in the Dragon event at the 1952 Summer Olympics.[1]