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 .
The 2021 Census of Population conducted by Statistics Canada reported that Hemmingford's population consisted of  individuals living in  out of its total private homes, with a change of  from the 2016 census data.