Saint-Nazaire-de-Dorchester is a parish municipality of 400 people in the Bellechasse Regional County Municipality, Quebec, part of the Chaudière-Appalaches administrative region.

It is the least populous municipality in Bellechasse.

[2] In the 2021 Census of Population conducted by Statistics Canada, Saint-Nazaire-de-Dorchester had a population of 338 living in 149 of its 178 total private dwellings, a change of -6.9% from its 2016 population of 363.

With a land area of 51.56 km2 (19.91 sq mi), it had a population density of 6.6/km2 (17.0/sq mi) in 2021.

This Chaudière-Appalaches location article is a stub.