33rd Brigade or 33rd Infantry Brigade may refer to:
Australia 33rd Brigade (Australia), a unit of the Australian Army
Canada 33 Canadian Brigade Group, a unit of the Canadian Army
Greece 33rd Mechanized Infantry Brigade (Greece)
India 33rd Indian Brigade of the British Indian Army in the First World War 33rd Indian Infantry Brigade of the British Indian Army in the Second World War
Iran 33rd Al-Mahdi Airborne Brigade
Japan 33rd Independent Mixed Brigade (Imperial Japanese Army) 33rd Mixed Brigade (Imperial Japanese Army)
Ukraine 33rd Mechanized Brigade (Ukraine)
United Kingdom 33rd (Western) Anti-Aircraft Brigade 33rd Armoured Brigade (United Kingdom) 33rd Infantry Brigade (United Kingdom) 33rd Brigade, Royal Field Artillery 33rd Divisional Trench Mortar Brigade
United States 33rd Infantry Brigade Combat Team (United States), a unit of the United States Army
See also 33rd Division (disambiguation) 33rd Regiment (disambiguation) 33rd Squadron (disambiguation)