Grenville, Grenville-sur-la-Rouge

Prior to April 24, 2002, it was an independent township municipality. On that date it merged with the village municipality of Calumet to form a new municipality which took the name Grenville-sur-la-Rouge,^[3] and each of the two components became boroughs of the new municipality.

The village municipality that shares the name "Grenville" remained independent; it borders on Grenville-sur-la-Rouge but is not part of it.

The name "Grenville" comes from William Wyndham Grenville, a British statesman who served briefly as British prime minister (1806–1807). While Canada was still under British rule, a canal was built by the military to bypass a series of rapids in the Ottawa River. The canal and the settlement that arose in the region were named in Lord Grenville's honour.

45°43′N 74°40′W / 45.72°N 74.67°W / 45.72; -74.67