Joshua Harold Burn FRS (6 March 1892 – 13 July 1981) was an English pharmacologist and Emeritus Professor of Pharmacology at Oxford University. Burn worked on the internal control of the body by the autonomic nervous system, carrying out seminal work on the release of noradrenaline from these nerves and introducing the controversial Burn-Rand hypothesis. The Nobel Laureate John Vane claimed "If anyone can be said to have moulded the subject of pharmacology around the world, it is he".