In the 2021 Census of Population conducted by Statistics Canada, Priestville had a population of 157 living in 73 of its 79 total private dwellings, a change of  from its 2016 population of 163.
In the 2021 Census of Population conducted by Statistics Canada, Priestville had a population of 157 residents in 73 out of its total 79 dwellings, indicating a decline from its 2016 population of 163.