Vincent Gaston Dethier (February 20, 1915 – September 8, 1993) was an American physiologist and entomologist. Considered a leading expert in his field, he was a pioneer in the study of insect-plant interactions and wrote more than 170 academic papers and 15 science books. From 1975 until his death, he was the Gilbert L. Woodside Professor of Zoology at the University of Massachusetts Amherst where he was the founding director of its Neuroscience and Behavior Program and chaired the Chancellor's Commission on Civility. Dethier also wrote natural history books for non-specialists, as well as short stories, essays, and children's books.