George Copley Varley (1910–1983) was a British entomologist and a pioneer in the studies of insect population dynamics and was the author of Insect Population Ecology, an influential text. He was Hope Professor of Entomology at Oxford from 1948. A colleague of David Lack during the war years, he conducted studies on insect population dynamics in Wytham Woods. He was married to ichthyologist Margaret Brown.