The Atomic Submarine is a 1959 independently made, American black-and-white science-fiction film directed by Spencer Gordon Bennet and starring Arthur Franz, Dick Foran, Brett Halsey, Joi Lansing and Jean Moorhead, with John Hilliard as the voice of the alien. The film was produced by Alex Gordon and distributed by Allied Artists Pictures Corporation.

The storyline of The Atomic Submarine concerns an alien invasion that begins when an underwater UFO (or USO – Unidentified Submerged Object) attacks the world's shipping for unknown reasons. The film showcases the then-new technology of nuclear submarines, and follows the crew and scientists aboard the atomic-powered USS Tigershark, which has been ordered to hunt down the mysterious underwater saucer and stop its disruption of sea commerce.