Saint-Léon-le-Grand is a parish municipality in the Maskinongé Regional County Municipality in the Mauricie region of the province of Quebec, Canada.

Demographics

In the 2021 Census of Population conducted by Statistics Canada, Saint-Léon-le-Grand had a population of 863 living in 369 of its 393 total private dwellings, a change of -7% from its 2016 population of 928. With a land area of 75.97 km (29.33 sq mi), it had a population density of 11.4/km (29.4/sq mi) in 2021.

Population trend:

• Population in 2021: 863 (2016 to 2021 population change: -7%)
• Population in 2016: 928
• Population in 2011: 992
• Population in 2006: 965
• Population in 2001: 966
• Population in 1996: 955
• Population in 1991: 925

Mother tongue:

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