The estimated 2024 population of Sainte-Agathe-des-Monts is 10,398. The population of Sainte-Agathe-des-Monts was recorded at 10,223 in the 2016 Canadian Census, and was recorded at 10,115 in the 2011 census. This is a change in population of 108, which is an annual growth rate of 0.21%.