Les Etchemins Regional County Municipality  Les Etchemins is a regional county municipality in the Chaudière-Appalaches region of eastern Quebec, Canada. It is named for the Etchemin River which finds its source in the region, as well as Etchemin Lake. Lac-Etchemin is the seat of the RCM. Les Etchemins can be found on the Maine border, southeast of Quebec City. There are 13 subdivisions within the RCM:  Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border: