In the
2021 Canadian census conducted by
Statistics Canada, Radisson had a population of 466 living in 231 of its 256 total private dwellings, a change of from its 2016 population of 514. With a land area of , it had a population density of in 2021. {{canada_census |location = Radisson |2021_population=466 | 2021_pop_delta=-9.3 | 2021_land_area=2.07 | 2021_pop_density=225.6 |2021_median_age=50 | 2021_median_age_m=48.4 | 2021_median_age_f=50.8 |2021_total_pvt_dwell=230 |2021_mean_hh_income= |2021_geocode=2021A00054716009 | 2021_access_date=2022-04-27 == Transportation ==