Montreal County was an electoral district of the Legislative Assembly of the Parliament of the Province of Canada, in Canada East. It was created in 1841 and was partially based on the previous electoral district of the same name for the former Legislative Assembly of Lower Canada. However, a significant part of the old district was carved out of it and formed the new electoral district of Montreal, a linguistic and ethnic gerrymander designed to gain support for the new Province of Canada, which had resulted from the merger of Lower Canada and Upper Canada.