12th Brigade or 12th Infantry Brigade may refer to:
Argentina XII Bush Brigade (Argentina)
Armenia 12th Peacekeeping Brigade (Armenia)
Australia 12th Brigade (Australia)
Brazil 12th Light Infantry Brigade (Airmobile)
Canada 12th Infantry Brigade (Canada)
China 12th Armored Brigade (People's Republic of China)
Germany 12th Panzer Brigade (Bundeswehr)
Hungary 12th Infantry Brigade (Hungary)
India 12th Cavalry Brigade (British Indian Army) of the British Indian Army in the First World War, distinct from the one below 12th Indian Cavalry Brigade of the British Indian Army in the First World War, distinct from the one above 12th Indian Brigade of the British Indian Army in the First World War 12th Indian Infantry Brigade of the British Indian Army in the Second World War
Israel Negev Brigade
Japan 12th Brigade (Japan)
Poland 12th Territorial Defence Brigade (Poland)
South Africa 12th Motorised Brigade (South Africa)
Spain XII International Brigade
Ukraine 12th Army Aviation Brigade (Ukraine) 12th Heavy Mechanized Brigade 12th Operational Brigade (Ukraine)
United Kingdom 12th Anti-Aircraft Brigade (United Kingdom) 12th Armoured Brigade (United Kingdom) 12th Mechanised Brigade (United Kingdom) 12th Mounted Brigade (United Kingdom) 12th Reserve Brigade 12th Signal Brigade (United Kingdom) Artillery units 12th (Howitzer) Brigade, Royal Field Artillery 12th (Carnarvon and Denbigh) Medium Brigade, Royal Garrison Artillery XII Brigade, Royal Horse Artillery
United States 12th Combat Aviation Brigade
See also 12th Division (disambiguation) 12th Regiment (disambiguation)