The 1931 Canada Census has been released albeit unindexed. But, if you know where your ancestors lived (check the searchable 1921 Canada Census for hints) you should be able to find them in the 1931 census (assuming they didn’t move).
I’ll delve into finding my own ancestors soon, but in the meantime I thought it would be interesting to see who lived at that time on the Beach Strip in Hamilton where I grew up. Below are images of the 1931 Canada Census for Hamilton Beach. In 1931, the Beach Strip was not yet a part of the City of Hamilton but rather a part of the old Saltfleet Township. Keep in mind some of the side streets changed names after annexation. Happy browsing!
Robert Finch Genealogy 