Sir Walter Adams CMG OBE (16 December 1906 – 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. Adams was appointed Officer of the Order of the British Empire (OBE) in 1945, and Companion of the Order of St Michael and St George (CMG) in 1952. He was knighted in 1970.