33rd Brigade
- 33 Canadian Brigade Group
- 33rd (Western) Anti-Aircraft Brigade
- 33rd Al-Mahdi Brigade
- 33rd Armoured Brigade (United Kingdom)
- 33rd Brigade (Australia)
- 33rd Division (disambiguation)
- 33rd Indian Brigade
- 33rd Indian Infantry Brigade
- 33rd Infantry Brigade (United Kingdom)
- 33rd Infantry Brigade Combat Team (United States)
- 33rd Mechanized Infantry Brigade (Greece)
- 33rd Regiment (disambiguation)
- 33rd Squadron (disambiguation)