Space Science Fiction Magazine was a US science fiction magazine published by Republic Features Syndicate, Inc. as part of a package of radio shows and related genre magazines. It was edited by Michael Avallone, though the masthead listed Lyle Kenyon Engel as editor instead. Two issues appeared, both in 1957. It published short stories by well-known writers, including Arthur C. Clarke and Jack Vance, but it was not successful, and the magazine ceased publication late in 1957.