In the 2021 Census of Population conducted by Statistics Canada, Lee Valley had a population of 242 living in 108 of its 111 total private dwellings, a change of -50.7% from its 2016 population of 491. With a land area of 3.15 km2 (1.22 sq mi), it had a population density of 76.8/km2 (199.0/sq mi) in 2021.[1]