Red Sonja is a fantasy sword and sorcery literary character created by Robert E. Howard. She is a female warrior who wears a very brief bikini-like costume of chainmail and who has sworn an oath never to have sex with any man unless he had defeated her in personal combat.

The She-Devil with a Sword has become the archetypical example of the fantasy literary figure of a fierce and stunningly beautiful female barbarian who typically wears sexy, but impractical skimpy armor.

Howard actually gave her only a passing mention and wrote no stories about her. The character was actually developed in the Conan the Barbarian comic books by Frank Thorne for Marvel Comics. She also appeared in the 1985 film, Red Sonja with Arnold Schwarzenegger as Kalidor (a Conan clone) and Brigitte Nielsen in the title role.