Attack of the Giant Leeches is an independently made, 1959 black-and-white science fiction-horror film, produced by Gene Corman and directed by Bernard L. Kowalski. It stars Ken Clark, Yvette Vickers, Bruno VeSota and Jan Shepard. The screenplay was written by Leo Gordon. The film was released by American International Pictures on a double bill with A Bucket of Blood. Later, in some areas in 1960, Leeches played on a double bill with the Roger Corman film House of Usher.

Kenneth Donovan Clark was an American B movie actor. He appeared in movies in the United States and Europe, including the Secret Agent 077 trilogy, South Pacific, and a number of Spaghetti Westerns.