Demographics
In the 2021 Census of Population conducted by Statistics Canada, St. Clair had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of , it had a population density of in 2021.
- Derek Drouin, high jumper, 2016 Olympic Games Gold medalist, 2012 Olympic Games Silver medalist
See also
- List of townships in Ontario