Saint-Augustin is a parish municipality in the Maria-Chapdelaine Regional County Municipality in the Saguenay–Lac-Saint-Jean region of Quebec, Canada. The municipality had a population of 351 as of the Canada 2016 Census.

Demographics

In the 2021 Census of Population conducted by Statistics Canada, Saint-Augustin had a population of 334 living in 148 of its 161 total private dwellings, a change of -4.8% from its 2016 population of 351. With a land area of 104.25 km (40.25 sq mi), it had a population density of 3.2/km (8.3/sq mi) in 2021.

Population trend:

• Population in 2016: 351 (2011 to 2016 population change: -12.3%)
• Population in 2011: 400 (2006 to 2011 population change: 1.8%)
• Population in 2006: 393
• Population in 2001: 424
• Population in 1996: 486
• Population in 1991: 534

Mother tongue:

• English as first language: 0%
• French as first language: 100%
• English and French as first language: 0%
• Other as first language: 0%