Henri-Mamert-Onésime Delafond (13 February 1805 – 15 November 1861) was a French veterinarian born in Saint-Amand-en-Puisaye, Nièvre department. Delafond was one of the primary representatives of veterinary science in France during the first half of the nineteenth century. He served as a professor and director of the Maisons-Alfort veterinary school. He was a member of the Académie de Médecine and of the Société nationale d'agriculture.