William Cusano (October 19, 1943 – November 14, 2012) was an Italian-born former politician in Quebec, Canada.
Born in Sepino-Campobasso, Italy, Cusano and his family moved to Canada in 1952.
He has a Bachelor of Arts from Loyola College as well as from the Université de Montréal in education and was a teacher and director for several schools in the Montreal region from 1962 to 1979.
Cusano was never named to the Cabinet by Bourassa, Daniel Johnson, Jr. or Jean Charest serving as Parliamentary Secretary of the Minister of Health and Social Services during Johnson's tenure as Premier in 1994.
During Jean Charest's First Mandate, he was named the National Assembly's First Vice-President.