The Ultraforce is a fictional superhero group that appears in American comic books published by Malibu, and later Marvel. The purpose of the group was to protect the public and keep other "Ultras" (superheroes) from becoming unruly.

The group consists of various Ultras in Malibu's Ultraverse, including the super-strong Prime; Hardcase, one of the first public Ultras and the most famous; Prototype, Ultra-Tech's armored spokesperson; Topaz, warrior queen of Gwendor; the undead Ghoul, the last surviving member of the Exiles; and the mysterious Contrary, who organized the team and provided their technology.

In 1995, Ultraforce was adapted into an animated television series that ran for 13 episodes. The series was produced by DIC Entertainment.

The team debuted in Ultraforce #1 (August 1994). In a similar fashion to the Avengers and Justice League, Ultraforce was an assemblage of ultras (superheroes) who each had an existing series of their own. The first Ultraforce series ran for 11 issues, from #0–10. The first 7 issues were written by Gerard Jones and drawn by George Pérez.

After the purchase of Malibu Comics by Marvel, Ultraforce began a crossover with the Avengers in the "Black September" event with Avengers/Ultraforce. After the event, the Ultraforce book was reformed and ran for 16 issues (September 1995–December 1996), from issue ∞ to issue 15. A one-shot (Ultraverse Future Shock #1) was published in February 1997 to wrap up unresolved plot lines. The Ultra's team were also depicted in a multitude of events such as Black September, Phoenix Resurrection, Ultraforce/Spider-Man, and Ultraverse Unlimited.

Marvel ended the Ultraverse line in 1997.

The only survivor of the Exiles, Ghoul, raised himself from his tomb and was harassed by the press and the public. The Ultra Hardcase rescued him and suggested to the press that only the Ultras could regulate other Ultras, not the government. Prime saw the interview on TV and decided to search for members of a new team to be called "Ultraforce". He convinced Prototype of the necessity of the team, but begin to fight him for the "leadership". The fight between the two young ultras alerted Contrary, who brought Hardcase and Ghoul to her airship and show them the impact that the fight was having on the general public. When Prime and Prototype were fighting in the land, the villain named Atalon, king of the fire people, brought them underground. Hardcase went to rescue them. Meanwhile, one of the three queens of Gwendor, Topaz, arrived on Earth from the Godwheel. Contrary promised her to return to her people. Prime and Prototype tried to fight Atalon but were defeated by him. Hardcase arrives just in time save them. After this, the team was formed and backed by the US government and president Bill Clinton. The members tried to recruit aid from the Freex, The Strangers, the Night Man, and Mantra, but were rejected. After manipulations of Contrary, Prime left the team temporarily. Attalon raised a new island and fought Ultraforce in the surface. In the fight, Prime returned and Atalon detonated a nuclear missile in the isle.

In the battle with Attalon, the young ultra Pixx sacrificed herself to disable the nuclear arsenal of the villain and was killed by the increasing radiation. In the end, Attalon was defeated and after a negotiation with Contrary, he left the surface world to its own devices. In the next months, the Ultra Ghoul investigated the strange death of the singer Mosh.