The musical theme for the film's main credits and Zorro's action sequences was originally scored by Max Steiner and used in Le avventure di Don Giovanni (1948) starring Errol Flynn.
In the scene in the film where all the Dons meet, each Don's surname and place of residence is that of a Californian city, but none of the Don's names nor any of their home abodes are the same Californian place: Don Diego is from San Fernando; Don Francisco is from San Jose; Don Fernando is from San Diego; Don Jose is from San Bernardino; while Don Luis Obispo is from Bakersfield, the last one being a further joke, as the city does not fit with the others because it has no "San" prefix.
When the producers of the film thought that the voice and Spanish accent of the famous Canadian Shakespearean actress Helen Burns was not quite right for that of Zorro's extremely ancient servant, Consuelo, the role was re-voiced by one of the oldest Spanish-speaking actresses in Hollywood, a 70-year-old Argentine woman, colleague of Rita Hayworth's father, the dancer Eduardo Cansino.
In some countries like Australia, the film's title was changed to "Zorro Swings Again."
In the film Joker (2019), a theater marquee shows this film playing, as well as Blow Out (1981).