121st Brigade

121st Brigade may refer to:

121st Brigade a 'bantam' infantry formation of the British Army 1915–18

121st Infantry Brigade a deception formation of the British Army in Sicily 1943–44

CXXI Brigade Royal Artillery a British Army unit 1915–16

121st Artillery Brigade of the former Soviet Ground Forces

121st Brigade of the Chinese Republican army 1932

121st Field Artillery Brigade of the Egyptian Army

121st (Independent) Infantry Brigade of the Indian Army

121st Tank Brigade of the Red Army 1942

121st High-Power Howitzer Artillery Brigade of the Red Army 1945