Orcs are fictional humanoid creatures that are part of a fantasy race similar to Goblin.

Although the overall concept of orcs draws on various pre-existing myths, the main concept of these creatures comes from J.R.R. Tolkien's fantasy works, especially the Lord of the rings. In Tolkien's works, ORC is a kind of savage, aggressive, disgusting and often vicious species, which is in sharp contrast to the good elves and usually has the power of evil. Tolkien's concept of ORC was later adapted and introduced into other fantasy novels and role-playing and strategy games (such as Dungeons & Dragons, Warhammer and Warcraft), thus expanding people's understanding of popular creatures.

Early documents similar to orcs in etymology or concept can be found in Anglo Saxon materials. It includes Beowulf and 16th century Italian folklore, especially the legend of Giambattista Basile.