Grandbois is a surname of French origin, identified in particular in French America. Notable people with the surname include:

  • Alain Grandbois (1900–1975), poet and writer from Saint-Casimir, Quebec, having received the Prix Athanase-David three times in 1941, 1947 and 1969
  • Paul-Étienne Grandbois (1846–1907), a doctor and politician from Quebec, Canada
  • Peter Grandbois (born 1964), an American writer, publisher, academic and fencing trainer

See also

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  • Grandbois Lake, a freshwater body straddling the municipalities of Rivière-à-Pierre and Saint-Raymond, in Portneuf Regional County Municipality, Capitale-Nationale, Quebec, Canada
  • Prix Alain-Grandbois (English: Alain-Grandbois Prize), a literary prize of Quebec awarded each year