55th Brigade may refer to:
Afghanistan 055 Brigade, a guerrilla organization loyal to Osama bin Laden
China 55th Motorized Infantry Brigade (People's Republic of China)
India 55th Indian Brigade of the British Indian Army in the First World War 55th Indian Infantry Brigade of the British Indian Army in the Second World War
Iran 55th Airborne Brigade (Iran)
Israel 55th Paratroopers Brigade
Russia 55th Mountain Motor Rifle Brigade
Ukraine 55th Artillery Brigade (Ukraine)
United Kingdom 55th Infantry Brigade (United Kingdom) Artillery units 55th Brigade, Royal Field Artillery of World War I 55th (Wessex) Brigade, Royal Field Artillery after World War I 55th (Kent) Anti-Aircraft Brigade, Royal Garrison Artillery 55th (Northumbrian) Medium Brigade, Royal Garrison Artillery
United States 55th Maneuver Enhancement Brigade 55th Sustainment Brigade (United States)
See also 55th Division (disambiguation) 55th Regiment (disambiguation)