Lieutenant-Colonel Sir Ranulph Robert Maunsell Bacon QPM (6 August 1906 – 30 March 1988) was a British police officer. Bacon was born in Westgate-on-Sea, Kent, and educated at Tonbridge School and Queens' College, Cambridge. He joined the Metropolitan Police as a Constable in 1928 and was selected for Hendon Police College in 1934, passing out with the Baton of Honour. In 1966, he briefly served as Deputy Commissioner, from 8 April to his retirement in October.