27th Brigade or 27th Infantry Brigade may refer to:
- 27th Brigade (Australia), an infantry brigade during the Second World War
- 27th British Commonwealth Brigade, an amalgamated brigade of the British Commonwealth
- 27th Mountain Infantry Brigade (France), a unit of the French Army
- 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
- 27th Infantry Brigade Combat Team (United States), a unit of the United States Army
- 27 Brigade, Taiwanese guerrilla force active after the 228 Incident
Units of the United Kingdom: