The Outer Reaches is an anthology of science fiction stories edited by August Derleth.

The stories had originally appeared in the magazines Fantasy & Science Fiction, Astounding Stories, Blue Book, Maclean's, Worlds Beyond, Amazing Stories, Fantastic Adventures, Thrilling Wonder Stories and Galaxy Science Fiction or in the anthology Invasion from Mars.

According to Derleth, the stories were selected as "favorites" by the authors involved, who provide short explanations for their choices.

P. Schuyler Miller, although noting the stories "aren't all deathless prose," characterized them as "examples of the editor's good taste in writers and the authors' good taste in the difficult job of screening their own writings.

This article about a collection of science fiction short stories published in the 1950s is a stub.