Yokai Monsters: 100 Monsters (Japanese: 妖怪百物語, Hepburn: Yōkai Hyaku Monogatari, lit. One Hundred Yōkai Tales) is a 1968 Japanese fantasy horror film directed by Kimiyoshi Yasuda, with special effects by Yoshiyuki Kuroda. It is the first in a trilogy of films produced in the late 1960s, which focus around Japanese monsters known collectively as yōkai.

The films, produced by Daiei Film, all make extensive use of practical special effects known as tokusatsu. They largely make use of actors in costumes and puppetry. In some scenes, there are even examples of traditional animation.

Notably darker in tone than its more famous sequel, Yokai Monsters: 100 Monsters focuses much more on a traditional story than it does on its titular monsters. While monsters do appear throughout the film, they are relegated to antagonistic roles, more akin to their appearances in traditional kaidan.