Internet Archive search in Canadian Libraries
Censuses of Canada, 1665 - 1871
Tables on the social and economic conditions in Canada from the earliest settlements to 1871. Hosted by Queen's University Library.
Census Returns 1825 - 1921
Statistics Canada, search nominal indexes for historical census years.
Ancestry.ca census records 1825 - 1921
Early Canadiana Online pre-1901 census documents