XVIII Corps

18 Corps, 18th Corps, Eighteenth Corps, or XVIII Corps may refer to:

• 18th Army Corps (France)
• XVIII Army Corps (Wehrmacht), a unit of the German Army
• XVIII Corps (German Empire)
• XVIII Reserve Corps (German Empire)
• XVIII Corps (Ottoman Empire)
• XVIII Corps (United Kingdom)
• XVIII Airborne Corps, United States
• XVIII Corps (Union Army), a unit in the American Civil War