Major General Heathcote Howard Hammer, CBE, DSO & Bar, ED (15 February 1905 – 10 March 1961) was a senior officer in the Australian Army, seeing service during the Second World War. After working as a traveling salesman he joined the Militia, Australia's part-time military force, in 1923, starting out as an enlisted soldier before being commissioned as an officer. By 1939, having served with several infantry units, he had reached the rank of major. Following the outbreak of the Second World War, Hammer volunteered for overseas service and fought in Greece, North Africa, New Guinea and Bougainville. He remained in the military after the war, rising to command at divisional level before retiring in 1959. He died in 1961 at the age of 56.