Grignon or Grignion may refer to:
Places Rivière à Grignon, a tributary of lac Saint-Jean in Chambor, Quebec, Canada Grignon, Côte-d'Or, commune in Côte-d'Or department, France Grignon, Savoie, commune in Savoie department, France Grignon, a hamlet constituting, with the village of Thiverval, the commune of Thiverval-Grignon, in the department of Yvelines
Other uses Institut National Agronomique Paris-Grignon, a French grande école, part of AgroParisTech
Person with the surname Charles Grignion (disambiguation) Claude-Henri Grignon (1894–1976), writer, journalist, speaker and pamphleteer from Quebec Marcel Grignon (1914–1990), French cameraman Francis Grignon (born 1944), French politician