Who Goes There? is a 1938 science fiction horror novella by American author John W. Campbell, written under the pen name Don A. Stuart. Its story follows a group of people trapped in a scientific outpost in Antarctica with shapeshifting alien monsters able to absorb and imitate any living being. Who Goes There? was first published in the August 1938 issue of Astounding Science Fiction magazine and was also printed as The Thing from Another World, as well as included in the collection by the same title. Its extended novel version, found in an early manuscript titled Frozen Hell, was finally published in 2019.

Who Goes There? has been directly adapted to film in 1951 as The Thing from Another World by Christian Nyby and again in 1982 as The Thing, a more faithful treatment by John Carpenter. The story's many other adaptations and works inspired by it have spanned various media.