If your relatives lived in Toronto, start doing the happy dance.
The Toronto Public Library has digitized all of the Toronto city directories, from 1833 to 2001. This means every directory has now been digitized.
Previously, the library’s digitized Toronto directories covered 1833 to 1969, but those up to 2001 — the final year for directories — were still under copyright. Thanks to Fiona, Senior Services Specialist for local history, who secured special permission to make them available online, and support from Internet Archive, the entire collection is now available to search online.
A link to this collection is also available in the Genealogy Research Toolbox, under City Directories, on this website.