The Cisco Kid is a fictional character found in numerous film, radio, television and comic book series based on the fictional Western character created by O. Henry in his 1907 short story "The Caballero's Way", published in Everybody's Magazine, v17, July 1907, as well as in the collection Heart of the West (1907). Originally a murderous criminal in O. Henry's story, the Kid was depicted as a heroic Mexican caballero later in films, radio and television adaptations.

William Sydney Porter, better known by his pen name O. Henry, was an American writer known primarily for his short stories, though he also wrote poetry and non-fiction. His works include "The Gift of the Magi", "The Duplicity of Hargraves", and "The Ransom of Red Chief", as well as the novel Cabbages and Kings. Porter's stories are known for their naturalist observations, witty narration, and surprise endings.