Sir Hugh Robert Denison, originally Hugh Robert Dixson (11 November 1865 – 25 November 1940) was a businessman, parliamentarian and philanthropist in South Australia and later New South Wales. He was a member of the South Australian House of Assembly from 1901 to 1905, representing North Adelaide (1901-1902) and Adelaide (1902-1905). Outside of politics, he was involved in his family's tobacco business, a forerunner of the British-Australasian Tobacco Company, was involved with a number of newspapers, and founded the Macquarie Broadcasting Services Pty Ltd radio network. He changed his surname by deed poll in 1907 to avoid confusion with his uncle Sir Hugh Dixson.