Blainville is a provincial electoral district in the Laurentides region of Quebec, Canada that elects members to the National Assembly of Quebec. It contains the city of Blainville and two other smaller municipalities. It was created for the 1994 election from Groulx and Terrebonne electoral districts. In the change from the 2001 to the 2011 electoral map, it lost a part of the city of Blainville to Groulx electoral district; previously, the entire city was within Blainville electoral district.