The Mark of Zorro is a 1940 American black-and-white swashbuckling film released by 20th Century-Fox, directed by Rouben Mamoulian, produced by Darryl F. Zanuck, and starring Tyrone Power, Linda Darnell, and Basil Rathbone. The supporting cast features Eugene Pallette, Gale Sondergaard, and Robert Lowery. The film is based on the novel The Curse of Capistrano by Johnston McCulley, originally published in 1919 in five serialized installments in All-Story Weekly, which introduced the masked hero Zorro; the story is set in Southern California during the early 19th century. After the enormous success of the silent 1920 film adaptation, the novel was republished under that name by Grosset & Dunlap. The Mark of Zorro was nominated for an Academy Award for Best Original Score. The film was named to the National Film Registry in 2009 by the Library of Congress for being "culturally, historically or aesthetically significant", and to be preserved for all time.

Swashbuckler films are a subgenre of the action film genre, characterised by swordfighting and adventurous heroic characters, known as swashbucklers. While morality is typically clear-cut, heroes and villains alike often follow a code of honour. Some swashbuckler films have romantic elements, most frequently a damsel in distress. Both real and fictional historical events often feature prominently in the plot.