Sir Walter Adams CMG OBE (16 December 1906[2] – 21 May 1975) was a British historian and educationalist.

Adams was educated at University College London, and was a lecturer in history at the same institution from 1926 to 1934.

He was a Rockefeller Fellow in the United States from 1929 to 1930, and the organising secretary of the Second International Congress of the History of Science and Technology in 1931.

He served as secretary of the Academic Assistance Council from 1933 to 1938, and of the London School of Economics from 1938 to 1946; he also served as Deputy Head of the British Political Warfare Mission in the United States from 1942 to 1944, and as Assistant Deputy Director-General of the Political Intelligence Department of the Foreign Office in 1945.

His role in the Academic Assistance Council and the organisation of a public meeting at the Albert Hall at which Albert Einstein spoke in October 1933 is portrayed by the actor James Musgrave in the Netflix drama-documentary 'Einstein and the Bomb' (https://www.imdb.com/title/tt28756876/) After the war, he served as secretary of the Inter-University Council for Higher Education in the Colonies from 1946 to 1955; he was the principal of the College of Rhodesia and Nyasaland from 1955 to 1966, and subsequently Director of the London School of Economics from 1967 to 1974.