In the 2021 Census of Population conducted by Statistics Canada, Saint-René had a population of 946 living in 351 of its 373 total private dwellings, a change of 27% from its 2016 population of 745. With a land area of 61.54 km2 (23.76 sq mi), it had a population density of 15.4/km2 (39.8/sq mi) in 2021.[4]