William Key (footballer) should not be confused with William Ker (footballer).
| William Key | |
| Birth Place: | Glasgow, Scotland |
| Position: | Right half |
| Clubs1: | Vale of Clyde |
| Years2: | 1906–1907 |
| Clubs2: | Queen's Park |
| Caps2: | 31 |
| Goals2: | 2 |
| Years3: | 1907–1910 |
| Clubs3: | St Mirren |
| Caps3: | 79 |
| Goals3: | 1 |
| Nationalyears1: | 1907 |
| Nationalteam1: | Scotland |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
William Key was a Scottish footballer who played as a right half.
Born in Glasgow, Key played club football for Vale of Clyde,[1] Queen's Park and St Mirren,[2] [3] and made one appearance for Scotland in 1907.[4]
His brother George was also a Scotland international.[4]