Worlds of Tomorrow is an anthology of science fiction stories edited by August Derleth. It was first published by Pellegrini & Cudahy in 1953. Many of the stories had originally appeared in the magazines Worlds Beyond, Fantastic, Fantasy, The Magazine of Science Fiction, Fantasy and Science Fiction, If, Fantastic Adventures, Future, Startling Stories, Astounding Stories, Weird Tales, The Fantasy Fan and Thrilling Wonder Stories.