 The Pigou River is first mentioned by name in 1892 by the surveyor C. C. Duberger who wrote that "the Pigou River is small and does not appear to be long".According to the "Dictionnaire des rivières et lacs de la province de Québec" (1914), 

The river basin covers .It lies between the basins of the Loups Marins River and the Bouleau River.