In military terms, 4th Brigade may refer to:
Argentina IV Airborne Brigade (Argentina)
Australia 4th Brigade (Australia) 4th Armoured Brigade (Australia) 4th Light Horse Brigade 4th Motor Brigade (Australia)
Biafra 4th Commando Brigade (Biafra)
British India 4th Indian Infantry Brigade 4th (Secunderabad) Cavalry Brigade 4th (Rawalpindi) Brigade
Canada 4th Canadian Armoured Brigade 4th Canadian Infantry Brigade 4th Infantry Brigade (Canada) 4 Canadian Mechanized Brigade Group
China 4th Armored Brigade (People's Republic of China)
Croatia 4th Guards Brigade (Croatia)
Czech Republic 4th Rapid Deployment Brigade (Czech Republic)
France 4th Airmobile Brigade (France)
Georgia 4th Infantry Brigade (Georgia)
Germany 4th SS Panzer Grenadier Brigade Netherlands
Greece 4th Infantry Brigade (Greece)
Iran 4th Marine Brigade (Iran)
Ireland 4th Brigade (Ireland)
Israel 4th Armored Brigade "Kiryati"
Japan 4th Cavalry Brigade (Imperial Japanese Army) 4th Mixed Brigade (Imperial Japanese Army)
Kazakhstan 4th Mechanized Brigade (Kazakhstan)
Lebanon 4th Infantry Brigade (Lebanon)
New Zealand 4th Infantry Brigade (New Zealand) 4th New Zealand Armoured Brigade
Poland 4th Cavalry Brigade (Poland)
Romania 4th Engineer Brigade (Romania)
Russia 4th Rocket Brigade 4th Separate Guards Motor Rifle Brigade
Serbia 4th Army Brigade
South Africa 4th Infantry Brigade (South Africa)
Sweden Skaraborg Brigade
Turkey 4th Commando Brigade (Turkey) 4th Mechanised Infantry Brigade (Turkey)
Ukraine 4th Heavy Mechanized Brigade
United Kingdom 4th Anti-Aircraft Brigade (United Kingdom) 4th Armoured Brigade (United Kingdom), 1939–1945 4th Cavalry Brigade (United Kingdom) 4th Guards Brigade (United Kingdom) 4th Infantry Brigade (United Kingdom) 4th Light Brigade (United Kingdom) 4th London Infantry Brigade 4th (London) Mounted Brigade 4th Mechanized Brigade (United Kingdom) 4th Mounted Brigade (United Kingdom) 4th Parachute Brigade (United Kingdom) 4th Provisional Brigade (United Kingdom) 4th Reserve Brigade 4th Special Service Brigade Artillery units 4th Brigade Royal Field Artillery 4th County of London Brigade, Royal Field Artillery 4th East Anglian Brigade, Royal Field Artillery 4th Home Counties Brigade, Royal Field Artillery 4th Lowland Brigade, Royal Field Artillery 4th Northumbrian (County of Durham) Brigade, Royal Field Artillery 4th North Midland Brigade, Royal Field Artillery 4th South Midland Brigade, Royal Field Artillery 4th East Lancashire (Howitzer) Brigade, Royal Field Artillery 4th West Lancashire Medium Brigade, Royal Garrison Artillery 4th Brigade, Welsh Division, Royal Artillery 4th Welsh Brigade, Royal Field Artillery 4th West Riding Brigade, Royal Field Artillery 4th Wessex Brigade, Royal Field Artillery 4th Highland (Mountain) Brigade, Royal Garrison Artillery 4th Brigade, Northern Division, Royal Artillery 4th Brigade, North Irish Division, Royal Artillery 4th Brigade, Scottish Division, Royal Artillery IV Brigade, Royal Horse Artillery IV Brigade, Royal Horse Artillery (T.F.), Territorial Force
United States 4th Brigade, 1st Cavalry Division (United States) 4th Brigade, 1st Infantry Division (United States) 4th Brigade, 104th Division (United States) 4th Cavalry Brigade (United States) 4th Combat Aviation Brigade 4th Maneuver Enhancement Brigade 4th Marine Expeditionary Brigade 4th Medical Brigade 4th Reserve Officers' Training Corps Brigade 4th Security Force Assistance Brigade 4th Sustainment Brigade Brigade Combat Teams 4th Brigade Combat Team, 1st Armored Division 4th Brigade Combat Team, 1st Cavalry Division 4th Brigade Combat Team, 1st Infantry Division 4th Brigade Combat Team, 2nd Infantry Division 4th Brigade Combat Team, 3rd Infantry Division 4th Brigade Combat Team, 4th Infantry Division 4th Brigade Combat Team, 10th Mountain Division 4th Brigade Combat Team, 82nd Airborne Division 4th Brigade Combat Team, 101st Airborne Division
See also 4th Division (disambiguation) 4th Regiment (disambiguation)