Sir Leonard David Gammans, 1st Baronet (10 November 1895 – 8 February 1957), known as David Gammans, was a British Conservative Party politician. Gammans was educated at Portsmouth Grammar School. He served with the Royal Field Artillery 1914–1918. He was in the Colonial Service in Malaya, 1920-1934 and attached to the British Embassy in Tokyo, 1926–1928. In 1930 he toured in India, Europe and America and, on retiring from the Colonial Service, lectured in the US and Canada. he was Director and Secretary of the Land Settlement Association, 1934–1939.