Saint-Léon-de-Standon is a parish municipality of about 1,000 people in the Bellechasse Regional County Municipality in the Chaudière-Appalaches region of Quebec.

The Etchemin River goes through the municipality.

In the 2021 Census of Population conducted by Statistics Canada, Saint-Léon-de-Standon had a population of 1,042 living in 543 of its 678 total private dwellings, a change of -7.5% from its 2016 population of 1,127.

With a land area of 136.88 km2 (52.85 sq mi), it had a population density of 7.6/km2 (19.7/sq mi) in 2021.

This Chaudière-Appalaches location article is a stub.