Encyclopedia of Science Fiction or Science Fiction Encyclopedia may refer to:
The Encyclopedia of Science Fiction and Fantasy (first volume published in 1974), edited by Donald H. Tuck The Visual Encyclopedia of Science Fiction (published 1977), edited by Brian Ash The Encyclopedia of Science Fiction (first edition published 1979; now online), edited by Peter Nicholls and John Clute Encyclopedia of Science Fiction (1978 book), with consultant editor Robert Holdstock The Greenwood Encyclopedia of Science Fiction and Fantasy (2005), edited by Gary Westfahl Science Fact and Science Fiction: An Encyclopedia (2006), by Brian Stableford Science Fiction Literature through History: An Encyclopedia (2021), by Gary Westfahl