"Red Nails" is one of the books featuring Conan the Cimmerian (a.k.a Conan the Barbarian) written by American author Robert E. Howard. It is set in the pseudo-historical Hyborian Age and concerns Conan encountering a lost city in which the degenerate inhabitants are proactively resigned to their own destruction.

The tale also features a tough and beautiful female pirate named Valeria the Red, catching Conan's eye as well as his respect. Due to its grim themes of decay and death, the story is considered a classic of Conan lore and is often cited by Howard scholars as one of his best tales.