Fantastic Four was a Saturday morning cartoon produced by Hanna-Barbera Productions and the first animated series based on Marvel's comic book series Fantastic Four. The program, featuring character designs by Alex Toth, aired on ABC from 1967 to 1968. It lasted for 20 episodes, and was rerun as part of the continuing series Hanna-Barbera's World of Super Adventure.

* Contrary to some episode guides, Ted Cassidy did not supply the voice of the Thing for this series (although he did play Galactus in one episode, and indeed later voiced Thing in the 1978 version).
* Due to the rights to the Sub-Mariner being held by Grantray-Lawrence Animation, the adaptation of the first meeting between the FF and Namor was altered. Instead, Triton of the Inhumans was reworked into the Namor role.
* In the episode "Galactus", Sue Richards (The Invisible Girl), has the role originated by Alicia Masters (explaining to the Silver Surfer about humanity).
* Hanna-Barbera revived the Thing in 1979's Fred and Barney Meet the Thing, which loosely adapted the character.
* Through a series of transactions, Disney currently holds the rights to Marvel's 1960s-1990s animated output. However, the 1967-1968 Fantastic Four was produced by Hanna-Barbera, which is part of Time Warner, making the series one of only a handful of Marvel related TV projects not owned by Disney.