Theodore George Bentley Osborn (2 October 1887 – 3 June 1973) was a botanist, ecologist and academic.
Osborn attended Burnley Grammar School and then from 1905 went to the Victoria University of Manchester on a scholarship, and won first-class honours in botany (B.Sc., 1908).
In May 1912 he was appointed Professor of Botany, Vegetable Pathology, and Parasitology at the University of Adelaide in 1912, and both Osborn and his wife were admitted BSc ad eundum at the same ceremony.
[1] In 1928 Osborn accepted the chair of botany at the University of Sydney; he studied the coastal vegetation of New South Wales.
In 1937 Osborn became Sherardian Professor of Botany at the University of Oxford, was elected fellow of Magdalen College and admitted to the degree of M.A.