Shawinigan is also a territory equivalent to a regional county municipality (TE) and census division (CD) of Quebec, coextensive with the city of Shawinigan. Its geographical code is 36. Shawinigan is the seat of the judicial district of Saint-Maurice.
The name Shawinigan has had numerous spellings over time: Chaouinigane, Oshaouinigane, Assaouinigane, Achawénégan, Chawinigame, Shawenigane, Chaouénigane. It may mean "south portage", "portage of beeches", "angular portage", or "summit" or "crest". Before 1958 the city was known as Shawinigan Falls.