| William Long | |
| Sport: | Rowing |
| Birth Date: | 3 October 1935 |
| Birth Place: | Little Rock, Arkansas, United States |
| Height: | 175 cm |
| Weight: | 61 kg |
William Long (October 3, 1935 - March 19, 2010) was an American coxswain. He competed in the men's eight event at the 1960 Summer Olympics.[1]