Vassago may refer to:
- The enemy from Final Fantasy III.
- The notorious monster from Final Fantasy XI.
- The enemy from Final Fantasy XIV.
- The enemy from Final Fantasy Dimensions.
Vassago, in demonology, is a mighty Prince of Hell (see Hierarchy of demons), ruling over twenty-six legions of demons. He can be persuaded to tell the magician of events past and future, can discover hidden and lost things, and has a "good" nature.