William E. Stewart (born 1919 or 1920) was a trade unionist and leader of the Communist Party of Ontario in the 1970s.
Stewart was born and raised in Hamilton, Ontario and was a union organizer in the textile and electrical industries.
During World War II he served with the Canadian Armoured Corps.
[1] He lived in British Columbia in the 1950s and 1960s where he worked as a dockworker and was a Communist candidate in Vancouver South in the 1962 federal election and again in 1965.
He was succeeded as party leader by Mel Doig for the 1981 provincial election.