Alexander Steven Corbet (8 August 1896 – 16 May 1948) was a British chemist and naturalist. He was educated at Bournemouth and the University of Reading where he received a PhD in inorganic chemistry. In the late 1920s he and his wife, Irene (nee Trewavas), moved to Kuala Lumpur where Alexander worked as a soil microbiologist for the Rubber Research Institute of Malaya. There he became an expert on Malaysian butterflies, co-authoring The Butterflies of the Malay Peninsula with H.M. Pendlebury in 1934. In 1931 he and his family returned to the UK and Alexander worked at the ICI research station at Jealotts Hill. He later became deputy keeper of entomology at the British Museum (Natural History).