31st Brigade
31st Brigade or 31st Infantry Brigade may refer to:
Australia
Germany
France
Greece
India
- 31st Indian Brigade of the British Indian Army in the First World War
- 31st Indian Infantry Brigade of the British Indian Army in the Second World War
Italy
Malaysia
Russia
Sovet Union
Ukraine
United Kingdom
- 31st Armoured Brigade (United Kingdom)
- 31st Infantry Brigade (United Kingdom)
- 31st (North Midland) Anti-Aircraft Brigade
- 31st Brigade, Royal Field Artillery