Gordon Lee McClymont AO (8 May 1920 – 6 May 2000) was an Australian agricultural scientist, ecologist, and educationist. The originator of the term "sustainable agriculture", McClymont is known for his multidisciplinary approach to farm ecology. McClymont was the foundation chair of the Faculty of Rural Science at the University of New England, the first degree program of its kind to integrate animal husbandry, veterinary science, agronomy, and other disciplines into the field of livestock and agricultural production. In 1978, in recognition of his work and contributions to his field, he was appointed Officer of the Order of Australia.