Authentic Science Fiction was a British science fiction magazine published in the 1950s that ran for 85 issues under three editors: Gordon Landsborough, , and E.C. Tubb. The magazine was published by Hamilton and Co., and began in 1951 as a series of novels appearing every two weeks; by the summer it became a monthly magazine, with readers' letters and an editorial page, though fiction content was still restricted to a single novel. In 1952 short fiction began to appear alongside the novels, and within two more years it completed the transformation into a science fiction magazine.