In the 2021 Census of Population conducted by Statistics Canada, Saint-Camille-de-Lellis had a population of 737 living in 380 of its 458 total private dwellings, a change of -2% from its 2016 population of 752. With a land area of 251.93 km2 (97.27 sq mi), it had a population density of 2.9/km2 (7.6/sq mi) in 2021.[4]