30th Brigade
- 30th (Howitzer) Brigade Royal Field Artillery
- 30th (Northumbrian) Anti-Aircraft Brigade
- 30th Armored Brigade Combat Team
- 30th Armoured Brigade
- 30th Army (disambiguation)
- 30th Battalion (disambiguation)
- 30th Brigade (Australia)
- 30th Brigade (United Kingdom)
- 30th Division (disambiguation)
- 30th Indian Brigade
- 30th Indian Infantry Brigade
- 30th Infantry Brigade (United Kingdom)
- 30th Mechanized Brigade (Ukraine)
- 30th Mechanized Infantry Brigade (Greece)
- 30th Mixed Brigade
- 30th Regiment (disambiguation)
- 30th Separate Guards Motor Rifle Brigade
- 30th Squadron (disambiguation)
- XXX Corps (disambiguation)