30th Cavalry may refer to:
Divisions 30th Cavalry Division (Soviet Union)
Regiments 30th Lancers (Gordon's Horse) 30th Virginia Volunteer Regiment, later renamed the 2nd Virginia Cavalry Regiment 30th Texas Cavalry Regiment
Squadrons 30th Cavalry Squadron, Queen's Guard, Thailand
See also 30th Division (disambiguation) 30th Brigade (disambiguation) 30th Regiment (disambiguation) 30th (disambiguation)