Booster Gold (Michael Jon "Booster" Carter) is a superhero appearing in American comic books published by DC Comics. Created by Dan Jurgens, the character first appeared in Booster Gold #1 (February 1986) and has been a member of the Justice League.

He is initially depicted as a glory-seeking showboat from the future based in Superman's home city, Metropolis, staging high-publicity heroics through his knowledge of historical events and futuristic technology. Carter develops over the course of his publication history and through personal tragedies to become a hero weighed down by his reputation.

The character has been portrayed in live action television by Eric Martsolf in Smallville and by Donald Faison in the seventh season of the Arrowverse series Legends of Tomorrow. Additionally, Tom Everett Scott, Diedrich Bader, and Bruce Timm have voiced Booster Gold in animation. The character will appear in an upcoming self-titled television series on HBO Max, set in the DC Universe (DCU) media franchise.

Booster Gold first appeared in Booster Gold #1 (February 1986), being the first significant new character introduced into DC Universe continuity after Crisis on Infinite Earths. The next year, he began to appear regularly in the Justice League series remaining a team member until the group disbanded in 1996. He and his former Leaguers subsequently appeared as the "Superbuddies" in the Formerly Known as the Justice League miniseries and its JLA: Classified sequel "I Can't Believe It's Not the Justice League".

At Wizard World Los Angeles in March 2007, Dan DiDio announced a new ongoing series titled All-New Booster Gold, which was later published as simply Booster Gold. The series follows the events of 52 and was initially co-written by Geoff Johns and Jeff Katz, with art by creator Jurgens and Norm Rapmund. The series focuses primarily on Booster Gold's clandestine time travel within the DC Universe. The series also features Rip Hunter, Skeets, and Booster's ancestors Daniel Carter and Rose Levin as supporting characters. The tagline of the series is: "The greatest hero you've never heard of!". Katz and Johns left the book after 12 issues (#1-10, #0, and a One Million issue). Jurgens and Rapmund stayed. Jurgens assumed writing duties following four issues by guests Chuck Dixon and Rick Remender.

In May 2010, Keith Giffen took over the Booster Gold title, linking it with the 26-week miniseries Justice League: Generation Lost, in which Booster worked with Fire, Ice, and Captain Atom to defeat the resurrected Maxwell Lord. From July 2010 through February 2011, Booster starred alongside Rip Hunter, Green Lantern, and Superman in the six-issue miniseries Time Masters: Vanishing Point, part of the "Return of Bruce Wayne" arc, which also reintroduced the Reverse-Flash and established the background for the 2011 DC crossover event Flashpoint. Jurgens returned to the main Booster Gold title with issue #44.

Jurgens's 1984 series proposal for Booster Gold compared the hero to U.S. Olympic Gold athletes such as Dorothy Hamill, Peggy Fleming, and Bruce Jenner, who had turned "Olympic gold into commercial gold", selling multiple products based on their fame and past accomplishments. Booster's origin as a security guard at a future Superman museum was altered when writer/artist John Byrne was brought to DC to reboot Superman's origin in The Man of Steel.

Since his origin, other characters within the DC Universe have hinted that there is a greater purpose to Booster Gold than he knows.