30th Brigade or 30th Infantry Brigade may refer to:
Australia 30th Brigade (Australia)
Greece 30th Mechanized Infantry Brigade (Greece)
India 30th Indian Brigade of the British Indian Army in the First World War 30th Indian Infantry Brigade of the British Indian Army in the Second World War
Romania Michael the Brave 30th Guards Brigade
Russia 30th Separate Guards Motor Rifle Brigade, a unit of the Russian Ground Forces
South Korea 30th Armored Brigade (South Korea)
Spain 30th Mixed Brigade, a unit of the Spanish Republican Army in the Spanish Civil War
Ukraine 30th Mechanized Brigade (Ukraine), a unit of the Ukrainian Ground Forces
United Kingdom 30th (Northumbrian) Anti-Aircraft Brigade 30th Armoured Brigade (United Kingdom) 30th Brigade (United Kingdom), 1914–1918 30th Infantry Brigade (United Kingdom) 30th (Howitzer) Brigade Royal Field Artillery
United States 30th Air Defense Artillery Brigade 30th Armored Brigade Combat Team, a unit of the United States Army 30th Medical Brigade
See also 30th Army (disambiguation) 30th Battalion (disambiguation) XXX Corps (disambiguation) 30th Division (disambiguation) 30th Regiment (disambiguation) 30th Squadron (disambiguation)