The Libraries and Archives Canada website has a number of resources for Canada, including the following databases for Canadian Censuses and Directories and Voter Lists
Canadian Directories: Who Was Where
Census of 1851 (Canada East, Canada West, New Brunswick and Nova Scotia)
Federal Census of 1871 (Ontario)
Census of the Northwest Provinces, 1906
Census of the Prairie Provinces, 1916
Census of 1921 (Available from Ancestry.ca)