Grouchy, Emmanuel, marquis de, 1766-1847, French general in the French Revolutionary and Napoleonic wars. He was made a marshal after Napoleon's return from Elba during the Hundred Days. His questionable tactical decisions—his failure to prevent the Prussians from joining the English—are often thought to be largely responsible for Napoleon's defeat in the Waterloo campaign.

Grouchy (or de Grouchy) is a French surname.

• Jean de Grouchy (1354 - 1435), knight at the time of the Hundred Years War
• Jean de Grouchy (Johannes de Grocheio) (c. 1255 – c. 1320), a French musical theorist
• Sophie de Grouchy (Sophie de Condorcet) (1764 - 1822), French writer and wife of Nicolas de Condorcet
• Emmanuel de Grouchy (1768 - 1847), soldier and Marshall of France