In Western Canada, i.e., Manitoba, Saskatchewan, Alberta, and British Columbia, the county or municipal district are not, and have never been, a governmental level which has been involved in vital statistics collection, marriage licenses, land title registrations, or anything else that is of interest to the genealogist.
Nor have they been a significant level in postal addresses, even before the advent of the postal code.
Some genealogy related databases have used the census division in place of the county, however this is a completely artificial entity defined and arbitrarily redefined by Statistics Canada (and it's predecessors) for it's own proposes of collecting and analyzing the statistics collected by the national and regional population census, and the variety of other census data that is collected.
Most people would not know their census division and could not tell you what it was, if asked. They are more likely to know their county, municipal district, school district, or incorporated populated place (City, Town, Village) as these governmental entities levy taxes and administer land use zoning, among other local responsibilities.