3rd Cavalry

3rd Cavalry, 3rd Cavalry Division, 3rd Cavalry Brigade or 3rd Cavalry Regiment may refer to:

Corps

 * III Cavalry Corps (Grande Armée)
 * III Cavalry Corps (German Empire)

Divisions

 * 3rd Cavalry Division (German Empire)
 * 3rd Cavalry Division (Reichswehr)
 * 3rd Cavalry Division Amedeo Duca d'Aosta, of the Italian Army
 * 3rd Cavalry Division (United Kingdom)
 * 3rd Cavalry Division (United States)

Brigades

 * 3rd Cavalry Brigade (Australia)
 * 3rd (Ambala) Cavalry Brigade, of the Indian Army in the First World War
 * 3rd (Meerut) Cavalry Brigade, of the Indian Army in the Second World War
 * 3rd Cavalry Brigade (Imperial Japanese Army)
 * 3rd Cavalry Brigade (Poland)
 * 3rd Cavalry Brigade (United Kingdom)
 * 3rd Brigade Combat Team, 1st Cavalry Division (United States)

Regiments and battalions

 * 3rd Cavalry Regiment (Australia)
 * 3rd Cavalry (India)
 * 3rd Bengal Cavalry, of the Indian Army
 * 3rd Bengal Light Cavalry, of the East India Company
 * 3rd Madras Cavalry, of the East India Company
 * 3d Armored Cavalry Squadron (South Vietnam)
 * 3rd Cavalry Regiment (United States)
 * 3rd Arkansas Cavalry, a Confederate regiment of the American Civil War
 * 3rd Arkansas Cavalry Regiment, a Confederate regiment of the American Civil War
 * 3rd Arkansas Cavalry Regiment (Union), a Union regiment of the American Civil War
 * 3rd Colorado Cavalry Regiment, a Union regiment of the American Civil War
 * 3rd Regiment Indiana Cavalry, a Union regiment of the American Civil War
 * 3rd Regiment Illinois Volunteer Cavalry, a Union regiment of the American Civil War
 * 3rd Regiment Iowa Volunteer Cavalry, a Union regiment of the American Civil War
 * 3rd Regiment Kentucky Volunteer Cavalry, a Union regiment of the American Civil War
 * 3rd Michigan Volunteer Cavalry Regiment, a Union regiment of the American Civil War
 * 3rd Ohio Cavalry, a Union regiment of the American Civil War
 * 3rd Virginia Cavalry, a Confederate regiment of the American Civil War
 * 3rd West Virginia Volunteer Cavalry Regiment, a Union regiment of the American Civil War
 * 3rd Wisconsin Volunteer Cavalry Regiment, a Union regiment of the American Civil War