In the 2021 Census of Population conducted by Statistics Canada, Hemmingford had a population of  living in  of its  total private dwellings, a change of  from its 2016 population of .
In the 2021 Census of Population conducted by Statistics Canada, Hemmingford had a population of  residing in  of its  total residential units, showing a change of  compared to its 2016 population count.