XII Corps

12th Corps, Twelfth Corps, or XII Corps may refer to:


 * 12th Army Corps (France)
 * XII Corps (Grande Armée), a corps of the Imperial French Army during the Napoleonic Wars
 * XII (1st Royal Saxon) Corps, a unit of the Imperial German Army
 * XII (Royal Saxon) Reserve Corps, a unit of the Imperial German Army
 * XII Corps (India)
 * XII Corps (North Korea)
 * XII Corps (Ottoman Empire)
 * XII Corps (Pakistan)
 * 12th Rifle Corps (Soviet Union)
 * XII Corps (United Kingdom)
 * XII Corps (United States)
 * XII Army Corps (Wehrmacht), a German unit World War II
 * XII Corps (Union Army), a unit in the American Civil War