In the 2021 Census of Population conducted by Statistics Canada, Mount Moriah had a population of 700 living in 285 of its 309 total private dwellings, a change of -6.2% from its 2016 population of 746. With a land area of 15.71 km2 (6.07 sq mi), it had a population density of 44.6/km2 (115.4/sq mi) in 2021.[1]