Jungle Emperor Leo is a Japanese shōnenmanga series written and illustrated by Osamu Tezuka which was serialized in the Manga Shōnen magazine from November 1950 to April 1954. An anime based on the manga was created by Mushi Production and was broadcast on Fuji Television from 1965 to 1967. It was the first color animated television series created in Japan. It began airing in North America from 1966. The later series was produced by Tezuka Productions.

The series and film are noted for laying the foundation for modern Japanese manga and anime culture. It is also frequently cited in discussions regarding potential influences on later Western animation, such as Disney's The Lion King.