Sir Charles Kingsley Webster KCMG FBA (25 July 1886 – August 1961) was a Cambridge-trained historian and British diplomat. He was educated at King's College, Cambridge as well as the Merchant Taylors' School, Crosby. After leaving Cambridge University, he went on to become a professor at Harvard, Oxford, and the London School of Economics. He also served as President of the British Academy from 1950 to 1954.