The Cisco Kid was a film, radio, television and comic book series based on the fictional Western character created by O. Henry in his short story "The Caballero's Way," published in 1907 in the collection Heart of the West. Films and television depicted the Cisco Kid as a heroic Mexican caballero, although in O. Henry's original story, he was a non-Hispanic character and a cruel outlaw, probably modelled on Billy the Kid.

Numerous movies featured the character, beginning in the silent film era with William R. Dunn portraying the Cisco Kid in The Caballero's Way (1914), followed by The Border Terror (1919). Warner Baxter won an Oscar for his portrayal of the Cisco Kid in the early sound film In Old Arizona (1928), directed by Irving Cummings and Raoul Walsh, who was originally slated to play the lead until a jackrabbit jumping through a windshield cost him an eye while on location.

The movie series with Cesar Romero in the title role began with The Cisco Kid and the Lady (1939), and Duncan Renaldo took over the reins in 1945 with The Cisco Kid Returns. Beginning with The Gay Cavalier (1946), Gilbert Roland played the character in a half-dozen 1946-1947 movies.