The 2/4th Battalion was an infantry battalion of the Australian Army. Raised on 3 November 1939 at Victoria Barracks, Sydney, New South Wales for service during World War II as part of the Second Australian Imperial Force, the battalion was initially attached to the 16th Brigade, 6th Division. Following a re-organisation of the structure of the Australian Army, which saw each infantry brigade reduced from four infantry battalions to three, the battalion was re-allocated to the 19th Brigade. The battalion saw action in Egypt, Libya and Greece before returning to Australia to fight the Japanese in New Guinea. Following the end of hostilities, the 2/4th Battalion was disbanded in Chermside on 12 November 1945.