The Hugo Award for Best Fanzine is given each year for non professionally edited magazines, or "fanzines", related to science fiction or fantasy which has published four or more issues with at least one issue appearing in the previous calendar year. Awards were also once given out for professional magazines in the professional magazine category, and since 1984 have been awarded for semi-professional magazines in the semiprozine category; several magazines that were nominated for or won the fanzine category have gone on to be nominated for or win the semiprozine category since it was established. The Hugo Awards have been described as "a fine showcase for speculative fiction" and "the best known literary award for science fiction writing".

A fanzine is a non-professional and non-official publication produced by enthusiasts of a particular cultural phenomenon for the pleasure of others who share their interest. The term was coined in an October 1940 science fiction fanzine by Russ Chauvenet and first popularized within science fiction fandom, and from there the term was adopted by other communities.