XI Corps
- 11th Army (disambiguation)
- 11th Army Corps (France)
- 11th Army Corps (Russian Empire)
- 11th Army Corps (Russian Federation)
- 11th Army Corps (Ukraine)
- 11th Battalion (disambiguation)
- 11th Brigade (disambiguation)
- 11th Division (disambiguation)
- 11th Regiment (disambiguation)
- 11th Squadron (disambiguation)
- List of military corps by number
- XI Army Corps (Italy)
- XI Army Corps (Spain)
- XI Army Corps (Wehrmacht)
- XI Corps (German Empire)
- XI Corps (Grande Armée)
- XI Corps (India)
- XI Corps (Ottoman Empire)
- XI Corps (Pakistan)
- XI Corps (Union Army)
- XI Corps (United Kingdom)
- XI Corps (United States)