In the 2021 Census of Population conducted by Statistics Canada, Joussard had a population of 334 living in 162 of its 232 total private dwellings, a change of 30% from its 2016 population of 257. With a land area of 19.87km2 (7.67sqmi), it had a population density of 16.8/km2 (43.5/sqmi) in 2021.
As a designated place in the 2016 Census of Population conducted by Statistics Canada, Joussard had a population of 223 living in 100 of its 175 total private dwellings, a change of 23.2% from its 2011 population of 181. With a land area of 3.68km2 (1.42sqmi), it had a population density of 60.6/km2 (156.9/sqmi) in 2016.
↑"Geographical Identification and Population for Unincorporated Places of 25 persons and over, 1971 and 1976". 1976 Census of Canada(PDF). Supplementary Bulletins: Geographic and Demographic (Population of Unincorporated Places—Canada). Vol.Bulletin 8SG.1. Ottawa: Statistics Canada. 1978.