Don Q, Son of Zorro is a 1925 American silent swashbuckler romance film and a sequel to the 1920 silent film The Mark of Zorro. It was loosely based upon the 1909 novel Don Q.'s Love Story, written by the mother-and-son duo Kate and Hesketh Hesketh-Prichard. The story was reworked in 1925 (after Hesketh Hesketh-Prichard's death) into a vehicle for the Johnston McCulley character Zorro. The film adaptation was made by screenwriters Jack Cunningham and Lotta Woods for United Artists studios. Douglas Fairbanks both produced the film and starred as its lead character. It was directed by Donald Crisp, who also played the villain Don Sebastian.

The film was well-received: the New York Times rated it one of its top ten films of 1925.