The 6th Machine Gun Battalion was a battalion of the Australian Army that was raised for service during World War II. Formed in late 1942 from the machine gun companies of several infantry battalions, the 6th Machine Gun Battalion undertook training on the New South Wales south coast before being deployed to New Guinea where they took part in the Markham and Ramu Valley – Finisterre Range campaign, defending the airfield at Gusap, and undertaking patrols. In early 1944, the battalion returned to Australia and over the course of the year was disbanded, with its personnel being sent to other units as reinforcements. Many of these personnel then saw combat in Borneo in 1945.