CANADA NATIONAL ARCHIVES - GENEALOGY
Canada's National Archives provides census history and a searchable database. Learn the history of census taking along with the history of the development of the country - what's missing - what's available.
The Canadian Confederation was organized in 1867. The Province of Canada, Nova Scotia, and New Brunswick were united into the Dominion of Canada...
Census was conducted in some areas well before that. Some Census is missing.
LIBRARY AND ARCHIVES OF CANADA - GENEALOGY Vital Records, Immigration, Citizenship, Military
As a note the UNITED STATES CENSUS is the same: If it was not a state, then it was not counted during the Federal Census. And if the population of a county was small, it might not have been included in the Federal Census either.