William Gilbert Chaloner FRS (22 November 1928 – 13 October 2016) was a British palaeobotanist.

He was Professor of Botany in the Earth Sciences Department at Royal Holloway, University of London, and visiting professor in Earth Sciences at University College, London.

[4] In 1947 he went to study Botany, Geology and Chemistry at the University of Reading and was awarded a first class Bachelor of Science degree in 1950 followed by a Ph.D. in 1953.

In 1979 he was appointed to the Hildred Carlyle Chair of Botany at Bedford College.

[5] Chaloner was an elected Fellow of the Royal Society in 1976,[6] the Linnean Society and the recipient of several awards, including the Linnean Medal and the Palaeontological Association's Lapworth Medal.