Project X is a 1968 independently made color science fiction film, produced and directed by William Castle, starring Christopher George, Greta Baldwin, Henry Jones, and Monte Markham. The film was distributed by Paramount Pictures and is adapted from the science fiction novels The Artificial Man (1965) and Psychogeist (1966) by L. P. Davies. The script was written by Edmund Morris and had special sequences animated by Hanna-Barbera.

Project X's story echoes some geopolitical themes of the late 1960s, such as overpopulation, emerging genetic engineering, biological warfare, cryogenics and fear of Asian dominance. It mixes in science fiction concepts like holographic devices, memory manipulation and viewing, and virtual environments to create a story about futuristic espionage.