William Dennison (Canadian politician)

William (Bill) Donald Dennison
Dennison, c. 1959
55th Mayor of Toronto
In office January 1, 1967 – December 31, 1972[1]
Preceded by	Philip Givens
Succeeded by	David Crombie
Member of Provincial Parliament
In office 1948–1951
Preceded by	Roland Michener
Succeeded by	Everett Weaver
Constituency	St. David
In office 1943–1945
Preceded by	Allan Lamport
Succeeded by	Roland Michener
Constituency	St. David
Toronto Ward 2 (Cabbagetown & Rosedale) Alderman
In office 1941-1943, 1953-1958
Toronto Board of Control
In office 1959-1966
Personal details
Born	(1905-01-20)January 20, 1905 Renfrew County, Ontario, Canada
Died	May 2, 1981(1981-05-02) (aged 76) Toronto, Ontario, Canada
Political party	Co-operative Commonwealth Federation
Other political affiliations	United Farmers of Ontario, New Democratic Party of Canada
Spouse	Dorothy Gertrude Bainbridge
Children	Lorna Milne
Residence	Toronto
Alma mater	Westmeath S.S. # 8
Occupation	School Principal

William Donald Dennison (January 20, 1905 – May 2, 1981) was a Canadian social-democratic politician who served in both the Ontario Legislative Assembly and finally as the City of Toronto's mayor. He served two nonconsecutive terms as a Member of Provincial Parliament (MPP) in the 1940s and early 1950s. After his provincial-level career, he focused on Toronto's municipal politics, holding offices as an alderman, member of the Toronto Board of Control, and finally as the city's mayor. He was the mayor from 1967 to 1972, winning two consecutive three-year terms. Prior to entering politics, he was a school principal and teacher. As of 2022, he was the last mayor of Toronto to be a member of the Orange Order.