Superhuman strength, also called superstrength, super-strength, or super strength, is an ability commonly employed in fiction. (Nonfiction instances of temporary extraordinary strength is usually specifically considered hysterical strength.) It is the ability for a character to be stronger and more physically powerful than humanly possible. Characters with super strength have been found in many ancient mythologies and religions. Superhuman strength is a common feature across a wide range of media, such as novels, comic books, television, films, and video games.

Superhuman strength is used by several characters in fantasy and science fiction, with a variety of proposed mechanisms such as cyborg body parts or genetic modification and even telekinetic fields in science fiction, or divine or magical/supernatural sources in fantasy. A plethora of comic book superheroes and supervillains usually have a degree of super strength. The level of strength portrayed can vary greatly, from just outside the "normal" human range of the strongest weightlifters of a given size or muscle mass (e.g. unarmored Master Chief), to nearly unlimited (e.g. Hulk). In most portrayals, superhuman strength is usually accompanied by superhuman stamina and durability as well.