86th Brigade may refer to:
Bangladesh 86th Independent Signals Brigade
Russia/Soviet Union 86th Anti-Aircraft Rocket Brigade
Spain 86th Mixed Brigade, a unit of the Spanish Republican Army
United Kingdom 86th Brigade (United Kingdom) 86th Brigade, Royal Field Artillery, a British Army unit during World War I 86th (East Anglian) (Hertfordshire Yeomanry) Brigade, Royal Field Artillery, a British Army unit after World War I
United States 86th Infantry Brigade Combat Team, a unit of the United States Army
See also 86th Division (disambiguation) 86th Wing (disambiguation) 86th Regiment (disambiguation)