In military terms, 4th Brigade may refer to:
Argentina edit
Australia edit
Canada edit
Croatia edit
Czech Republic edit
France edit
Israel edit
Japan edit
Lebanon edit
New Zealand edit
Poland edit
Romania edit
South Africa edit
United Kingdom edit
- 4th Armoured Brigade (United Kingdom), 1939–1945
- 4th Cavalry Brigade (United Kingdom)
- 4th Guards Brigade (United Kingdom)
- 4th Infantry Brigade (United Kingdom)
- 4th London Infantry Brigade
- 4th Mechanized Brigade (United Kingdom)
- 4th Mounted Brigade (United Kingdom)
- 4th Parachute Brigade (United Kingdom)
- 4th Special Service Brigade
- Artillery Brigades
United States edit
- 4th Brigade, 1st Armored Division (United States)
- 4th Brigade, 1st Cavalry Division (United States)
- 4th Brigade, 1st Infantry Division (United States)
- 4th Brigade Combat Team, 2nd Infantry Division (United States)
- 4th Brigade Combat Team, 10th Mountain Division (United States)
- 4th Brigade, 104th Division (United States)
- 4th Cavalry Brigade (United States)
- 4th Sustainment Brigade