27th Brigade or 27th Infantry Brigade may refer to:
Australia 27th Brigade (Australia), an infantry brigade during the Second World War
Canada 27th Canadian Infantry Brigade
British Commonwealth 27th British Commonwealth Brigade, an amalgamated brigade of the British Commonwealth
France 27th Mountain Infantry Brigade (France)
India 27th (Bangalore) Brigade of the British Indian Army in the First World War 27th Indian Infantry Brigade of the British Indian Army in the Second World War
Iran 27th Mohammad Rasulullah Brigade
Russia/Soviet Union 27th Rocket Brigade 27th Separate Guards Motor Rifle Brigade
Taiwan 27 Brigade, Taiwanese guerrilla force active after the 228 Incident
Ukraine 27th Artillery Brigade (Ukraine) 27th Pechersk Brigade (Ukraine)
United Kingdom 27th (Home Counties) Anti-Aircraft Brigade 27th Armoured Brigade (United Kingdom) 27th Infantry Brigade (United Kingdom) 27th (N Rhodesia) Infantry Brigade 27th Brigade Royal Field Artillery
United States 27th Infantry Brigade Combat Team (United States)
See also 27th Army (disambiguation) 27th Battalion (disambiguation) 27th Division (disambiguation) XXVII Corps (disambiguation) 27th Regiment (disambiguation) 27 Squadron (disambiguation)