Sir Denys Haigh Wilkinson FRS (born 5 September 1922 in Leeds, Yorkshire) is a British nuclear physicist. He was educated at Loughborough Grammar School and Jesus College, Cambridge. He holds the higher degree of ScD, an HonFilDr degree and an HonLLD degree. Wilkinson is the inventor of the Wilkinson Analog-to-Digital Converter (ADC), a fundamental electronic device with wide application.
He was elected a Fellow of the Royal Society in 1956 and he won the Hughes Medal in 1965 and the Royal Medal in 1980. Sir Denys has been an Honorary Fellow of Jesus College, Cambridge, since 1961. From 1976 to 1987 he was Vice-Chancellor of the University of Sussex (appointing him Emeritus Professor of Physics in 1987). He was knighted in 1974.
In 2001 the Nuclear Physics Laboratory at the University of Oxford, which he helped to create, was renamed as the Denys Wilkinson Building in his honour.