Roy Albert Crowson was a British biologist who specialized in the taxonomy of beetles.
He collected beetles and their larvae from around the world and studied the relationships between them.
He lectured at the Zoology Department of the University of Glasgow from 1949. His 1955 monograph, The natural classification of the families of Coleoptera, established a system for the classification of beetles that remains in use. His collections of British Coleoptera are in the Hunterian Museum, Glasgow, and his collections of world families, including large quantities of microscope slides and dissections, in the Natural History Museum, London.
The beetle family Crowsoniellidae is named in his honour.