Ogres are a classic type of monster popular in folklore and fairy tales. Generally accepted as evil creatures, they are most often described as being large, bulbous humanoids of hideous appearance and worse smell. Though sentient, ogres are not particularly bright, though they are ferocious and cruel. In many literary works, they are described as hateful monsters that bully those weaker than themselves. They are widely believed to eat human children.

Ogres share a number of characteristics with trolls and orcs, and so there is often much confusion in telling their species apart.