William Elgin Swinton (30 September 1900 in Kirkcaldy – 12 June 1994 in Toronto), was a Scottish paleontologist.
William Swinton was born as the son of William Wilson Swinton Jr, a clerk, and Rachel Cargill; he had one sibling, his younger sister Mary. He received his secondary education in Dundee and Glenalmond. From 1917 onwards, he studied at the University of Glasgow, from which he graduated in 1922. In 1920, he partook in an expedition to Spitsbergen. Between 1922 and 1924, he was an assistant at the geology department of the British Museum (Natural History) in London. Subsequently, Swinton was appointed as a curator of fossil amphibians, reptiles and birds. In 1933, he received his Ph.D from the University of Glasgow.
He enlisted in the Royal Navy in 1937, and served during the entire Second World War with Navy intelligence, eventually reaching the rank of Lieutenant commander. In the late 1950s he joined an expedition to climb Mount Everest, but he failed to reach the summit. He received the Darwin Medal from the USSR Academy of Sciences in 1959. Two years later, he emigrated to Canada to take up a post in Toronto.
At the museum, Swinton was responsible for writing a large number of museum guides and books; the latter mainly popularizing works about paleontology. One of his most famous works was The Dinosaurs from 1934. These books were translated into many languages, making him influential in determining the public perception of dinosaurs in the middle of the twentieth century. However, his ideas on the subject were already old-fashioned at the time, and this problem became more urgent as the books were being reprinted for decades.