The 19th Brigade was a formation of the Australian Army during World War II as part of the 6th Division. Formed in April 1940 as a result of the reorganisation of the Second Australian Imperial Force when the infantry brigades composition was reduced from four to three battalions. The fourth battalion from the 16th, 17th and 18th Brigades was proposed to form part the 19th Brigade. Due to transport problems, the third battalion of the 18th Brigade joined the brigade instead of the 2/12th Battalion.