The list of by-elections in the Province of Canada includes every by-election held in the Province of Canada from its creation in 1841 until Confederation in 1867. By-elections occurred whenever there was a vacancy in the Legislative Assembly. The Legislative Council was made an elective body in 1856 and by-elections occurred there as well. Due to the fluid nature of party allegiances during this time no attempt has been made to show them in this list.