| William Gallacher | |
| Fullname: | William Gallacher |
| Position: | Inside forward |
| Years2: | 1919–1920 |
| Caps2: | 4 |
| Goals2: | 0 |
| Birth Place: | Dalmuir, Scotland |
William Gallacher was a Scottish professional association footballer who played as an inside forward. He played four games for Burnley in the English Football League in the 1919–20 season.