Beyond Time and Space is an anthology of science fiction stories edited by American writer August Derleth.

[1] Reviewer Villiers Gerson of The New York Times praised the anthology, saying "the overall excellence of the stories selected is a measure of Mr. Derleth's ability of an editor.

"[2] Groff Conklin noted that while Derleth's selection of older stories was sound, the more contemporary choices tended to be "tales of the weird, the supernatural or the fantastic" which did not "represent modern science fiction".

[3] P. Schuyler Miller praised the anthology as a "fat but rather expensive collection truly representative of most of the growing pains of our young-old genre.

"[4] Boucher and McComas declared that "Derleth has succeeded admirably in his attempt to 'glance backward over the stream of science fiction,' bringing together the much discussed -- but too seldom read -- classics of the field" and "some of the best efforts of" contemporary writers".