Montréal-Dorion was a provincial electoral district in the province of Quebec, Canada. Formed in 1912 from parts of Hochelaga, the Montreal area district remained until 1939 when it was split into two ridings:Montreal-Jeanne-Mance and Montreal-Mercier. Dorion was also used from 1966 to 1994 for the riding of the same name. Today, it is part of Laurier-Dorion.