XI Corps
11 Corps, 11th Corps, Eleventh Corps, or XI Corps may refer to:
- 11th Army Corps (France)
- XI Corps (Grande Armée), a unit of the Imperial French Army during the Napoleonic Wars
- XI Corps (German Empire), a unit of the Imperial German Army
- XI Army Corps (Wehrmacht), a unit of the Nazi German Army
- XI Corps (India)
- XI Army Corps (Italy)
- XI Corps (Ottoman Empire)
- 11th Army Corps (Russian Empire)
- 11th Army Corps (Russian Federation)
- XI Corps (Pakistan), a unit of the Pakistani Army
- XI Army Corps (Spain)
- 11th Army Corps (Ukraine)
- XI Corps (United Kingdom), a unit of the British Army
- XI Corps (United States), a unit of the United States Army
- XI Corps (Union Army), a unit in the American Civil War