Far Boundaries is an anthology of science fiction stories edited by American writer and anthologist August Derleth.

It was first published by Pellegrini & Cudahy in 1951.

Many of the stories had originally appeared in the magazines Variety, Dublin Literary Magazine, Knight’s Quarterly Magazine, Scribner's, Astounding Stories, The Arkham Sampler, Planet Stories, Super Science Stories, Thrilling Wonder Stories, Startling Stories, The Magazine of Fantasy & Science Fiction, Blue Book and Galaxy.

P. Schuyler Miller received the anthology favorably, characterizing it as a "source-book in imaginative literature.

"[1] The Meriden Record praised Far Boundaries as "a well-rounded anthology capable of causing the mind to spin at the same time that it makes the spine crawl.