Guy Cousineau (born June 4, 1937) was the last mayor of the city of Vanier before it was amalgamated with Ottawa in 2001.
He was born in Eastview, which was later renamed Vanier, in 1937, the son of Trefflé Cousineau and Augustine Charette.
His grandfather, Jean-Baptiste Charette, was mayor of Eastview in 1936.
He succeeded Gisèle Lalonde to become the 17th and last mayor of the city.
He married Raymonde Proulx in 1962 and Yolande Patry in 1984.