Grosses-Roches () is a municipality in Quebec, Canada.
Settlement began in the mid-19th century and the place was called Grosses-Roches (French for "big rocks"), referring to a large number of small, rounded, brownish rocks. In 1870, the parish of Saints-Sept-Frères was founded. In 1881, the post office opened.
On August 19, 1939, the Municipality of Grosses-Roches was formed when it ceded from the Parish Municipality of Sainte-Félicité.
In the 2021 Census of Population conducted by Statistics Canada, Grosses-Roches had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of , it had a population density of in 2021.
List of former mayors: