Saint-Marcellin, QuebecSaint-Marcellin is a parish municipality in the Canadian province of Quebec, located in the Rimouski-Neigette Regional County Municipality in the Bas-Saint-Laurent region.WWW st-marcellin.qc.caDemographicsIn the 2021 Census of Population conducted by Statistics Canada, Saint-Marcellin had a population of living in of its total private dwellings, a change of from its 2016 population of. With a land area of, it had a population density of in 2021.