Vice-Admiral Sir Humphrey Thomas Walwyn, KCSI, KCMG, CB, DSO (25 January 1879 – 29 December 1957) was an officer of the Royal Navy, who served during the Second Boer War and First World War, and was the Commander-in-Chief of the Royal Indian Navy from 1928 until his retirement in 1934. He then served as Governor of Newfoundland from 1936, throughout the Second World War, until 1946.