A science fiction fanzine is an amateur or semi-professional magazine published by members of science fiction fandom, from the 1930s to the present day. They were the earliest form of fanzine, and at one time constituted the primary form of science-fictional fannish activity ("fanac").

The term 'fanzine' is now also used, by extension, to refer to fan-created magazines in other areas; the earliest rock-and-roll fanzines were edited by science fiction fans. A significant fraction of modern computer/Web/Internet slang, abbreviations, etc. is derived from the jargon of the fanzine fans.

The fanzine movement is now well represented on the Web, see webzines.

External links:

• http://fanac.org/fanzines/
• Temple University Fanzine Collection
• Science Fiction Fanzines article by Steven Perkins
• British Fanzine Bibliography
• Memory Hole: a SF Fanzine bibliography
• Open Directory category: Fanzines
• efanzines.com This site contains recent fanzines from fans working in the traditions of fanzine fandom. These zines are in pdf format. There are also links to other sites which will be of interest to those who like (or want to know more about) fanzine fandom.
• Corflu An annual convention for SF fanzine fans. The name Corflu is the fannish term for correction fluid, as used on mimeograph stencils in the pre-computer era.
• Ditto Another SF fanzine convention