The Herculoids is an American Saturday-morning animated-cartoon television series, created and designed by Alex Toth, that was produced by Hanna-Barbera Productions. The show debuted on September 9, 1967, on CBS. Hanna-Barbera produced one season for the original airing of the show, although the original 18 episodes were rerun during the 1968–69 television season, with The Herculoids ending its run on September 6, 1969. Eleven new episodes were produced in 1981 as part of the Space Stars show. The plotlines are rooted in science fiction and fantasy.

Alexander Toth was an American cartoonist active from the 1940s through the 1980s. Toth's work began in the American comic book industry, but he is also known for his animation designs for Hanna-Barbera throughout the 1960s and 1970s. His work included Super Friends, Fantastic Four, Space Ghost, Sealab 2020, The Herculoids and Birdman. Toth's work has been resurrected in the late-night, adult-themed spin-offs on Cartoon Network’s late night sister channel Adult Swim: Space Ghost Coast to Coast, Sealab 2021 and Harvey Birdman, Attorney at Law.