Vice-Admiral Kenneth Gilbert Balmain Dewar, CBE, RN (21 September 1879 – 8 September 1964) was an officer of the Royal Navy. After specialising as a gunnery officer, Dewar became a staff officer and a controversial student of naval tactics before seeing extensive service during the First World War. He served in the Dardanelles Campaign and commanded a monitor in home waters before serving at the Admiralty for more than four years of staff duty.