L'Assomption Regional County Municipality
L'Assomption ("The Assumption") is a regional county municipality in the Lanaudière region of Quebec, Canada. The seat is L'Assomption. L'Assomption is located directly north of the city of Montreal. It is named for the L'Assomption River, which flows through the region from the north before emptying into the Saint Lawrence River in the south of the region at Repentigny. Subdivisions. There are 5 subdivisions within the RCM: Transportation. Access Routes. Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border: References.