What is the name of the supervillain who killed Gwen Stacy?

The supervillain who killed Gwen Stacy was the Green Goblin. In the 1973 storyline “The Night Gwen Stacy Died,” Norman Osborn abducts Gwen and takes her to the George Washington Bridge to lure Spider-Man into a confrontation.

During the battle, the Green Goblin throws Gwen from the bridge. Spider-Man catches her with a web, but she dies. The story leaves some physical details open to interpretation: readers have debated whether the fall itself or the sudden stop caused her fatal injury. The Green Goblin is nevertheless the clear villain responsible for the attack and Gwen’s death.

The story appeared in The Amazing Spider-Man #121–122 and became one of Marvel’s most influential turning points. Gwen had been Peter Parker’s close friend and romantic partner, so her death permanently changed Spider-Man’s life and the tone of superhero comics. It also helped establish that major characters could die permanently, rather than merely disappearing between adventures.

A common mix-up is confusing Gwen Stacy with other Spider-Man victims or alternate-universe versions of Gwen, such as Spider-Gwen. In the main classic continuity, the canonical answer is Norman Osborn, acting as the Green Goblin.