War wagon is an ancient Chinese, medieval Korean, or Czech siege weapon.

War wagon may also refer to:

• The War Wagon, a 1967 western film starring John Wayne and Kirk Douglas
• Hwacha, a Korean weapon which employs gunpowder and projectiles
• A carroccio or carro della guerra, a four-wheeled war altar used by the medieval republics of Italy
• War Wagon, in comics, a fictional weapon used unsuccessfully against the Hulk; see Betty Ross