| William Blair | |
| Birth Date: | 11 March 1872 |
| Birth Place: | Greenock, Scotland |
| Years1: | – |
| Years2: | 1891–1897 |
| Caps2: | 91 |
| Goals2: | 7 |
| Years3: | 1897–1902 |
| Clubs3: | Morton |
| Caps3: | 40 |
| Goals3: | 7 |
| Years4: | – |
| Totalcaps: | 131 |
| Totalgoals: | 14 |
| Nationalyears1: | 1896[1] |
| Nationalteam1: | Scotland |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
William Blair (born 11 March 1872) was a Scottish footballer who played as a left half for Greenock Morton, Third Lanark and Scotland.[2] He was also an accomplished rower.