The supernatural world has enraptured humanity for centuries through mythical creatures, tales of the afterlife, and pantheons of gods. Among some of the most popular and longstanding myths are those of demonic creatures, entities of evil that exist to oppose the good forces of the universe.

Abrahamic religions (Christianity, Judaism, and Islam) share many connected stories and texts. However, some are not canonical for every religion.

But both canon and non-canon texts have explored the history and characteristics of demons and the organizational structure of Hell, or of equivalent beings that usher evil into the world.