39th Brigade or 39th Infantry Brigade may refer to:
British India 39th Indian Infantry Brigade
Canada 39 Canadian Brigade Group, a formation of the Canadian Army
Iraq 39th Harakat al-Abdal Brigade
Russia 39th Separate Guards Motor Rifle Brigade
Spain 39th Mixed Brigade, a unit of the Spanish Republican Army
Ukraine 39th Marine Brigade (Ukraine) 39th Separate Air Assault Brigade 39th Tactical Aviation Brigade (Ukraine)
United Kingdom 39th Anti-Aircraft Brigade (United Kingdom) 39th Infantry Brigade (United Kingdom) 39th Brigade Royal Field Artillery 39th Divisional Trench Mortar Brigade
United States 39th Infantry Brigade Combat Team, a unit of the United States Army
See also 39th Division (disambiguation) 39th Regiment (disambiguation) 39th Battalion (disambiguation) 39th Squadron (disambiguation)