The 1931 census, Schedule 1: Population, is now available in name indexed form at Library and Archives Canada.
LAC released census images on 1 June. However, a name-indexed version now being available for free at their site seems little publicity.
The indexing is by Ancestry and FamilySearch using AI technology with the index linked to original images.
Be sure to check the original document as I have already found two errors on family members. I think AI does not read cursive!!