Solomon Grundy (Cyrus Gold) is a supervillain and occasional antihero appearing in American comic books published by DC Comics. He was originally depicted as a murder victim brought back to life as a corporeal revenant or zombie, though subsequent versions of the character have occasionally depicted a different origin. His name is taken from the 19th century nursery rhyme "Solomon Grundy".

Grundy was introduced as an enemy of comic book hero Alan Scott (the original Green Lantern), but has since become a prominent enemy for a number of superheroes such as Superman, Batman, and other members of the Justice League. As a revenant whose backstory often involves coming back to life after being deposited in the swamp, later writers have also given him ties to Swamp Thing, one of DC's horror-fantasy heroes.

Solomon Grundy appeared in the DC Animated Universe, where he first became an antihero. The character made his live-action debut as The Acolyte in the second season of the Arrowverse series Arrow, portrayed by Graham Shiels, and as Butch Gilzean in the first four seasons of Fox's television series Gotham, portrayed by Drew Powell. Solomon Grundy also appeared in CGI form in the first and second seasons of the television series Stargirl for DC Universe and The CW network.