In demonology, Malthus (also Halphas, Malthas, or Malthous) is an Earl of Hell, commanding 26 legions of demons, who is said to have a rough voice when speaking. He is often depicted in the shape of a stork.

Malthus builds towers and fills them with ammunition and weapons, and can outright incite war. He is a prince of Hell. He is also said to send his legions into battle, or to places designated by higher commanding demons.