38th Brigade may refer to:
- 38th Guards Air Assault Brigade, a unit of the Special Forces of Belarus
- 38 Canadian Brigade Group, a unit of the Canadian Army
- 38th Indian Infantry Brigade, a unit of the British Indian Army
- 38th Independent Mixed Brigade (Imperial Japanese Army)
- 38th Guards Communications Brigade, a unit of the Russian Airborne Forces
- 38th Brigade (United Kingdom)
- 38th (Irish) Brigade, United Kingdom
- 38th Light Anti-Aircraft Brigade (United Kingdom)
- 38th Air Defense Artillery Brigade (United States)
- 38th Sustainment Brigade, a unit of the United States Army