The Monster of Piedras Blancas is a 1959 American horror monster film. It was produced by Jack Kevan, directed by Irvin Berwick, and stars Jeanne Carmen, Les Tremayne, John Harmon, Don Sullivan, Forrest Lewis, and Pete Dunn. The film was released by Filmservice Distributors Corporation as a double feature with Okefenokee.

The Monster of Piedras Blancas was influenced by Creature from the Black Lagoon (1954). Kevan, who had supervised the manufacture of the Gill-man suit and worked on Mole People costumes at Universal-International, created the Piedras Blancas monster costume. Kevan employed several of his former Universal associates on the picture, including soundman Joe Lapis and prop master Eddie Keys.