In the 2021 Census of Population conducted by Statistics Canada, Saint-Camille had a population of 551 living in 225 of its 245 total private dwellings, a change of 4.2% from its 2016 population of 529. With a land area of 83.1 km (32.1 sq mi), it had a population density of 6.6/km (17.2/sq mi) in 2021.