William Downie (4 December 1908 – 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.