| Bill Downie | |
| Birth Date: | 3 December 1909 |
| Birth Place: | Deniliquin |
| Death Place: | Burma-Siam Railway, Burma |
| Originalteam: | Eaglehawk |
| Height: | 184 cm |
| Weight: | 81 kg |
| Statsend: | 1933 |
| Years1: | 1929–1932 |
| Club1: | Footscray |
| Games Goals1: | 54 (26) |
| Years2: | 1933 |
| Club2: | St Kilda |
| Games Goals2: | 15 (2) |
| Games Goalstotal: | 69 (28) |
William Downie (4 December 1908 - 11 September 1943) was an Australian rules footballer who played with Footscray and St Kilda in the Victorian Football League (VFL).
Downie played as a ruckman and represented Footscray 54 times before finishing off his VFL career with a year at St Kilda. He was then picked up by Northcote in the Victorian Football Association (VFA) and was a member of their 1937 premiership side.
He served his country in World War II and was killed by a Japanese guard in a Prisoner of War camp.