Mentalis is a media science fiction fanzine by Tim Richards.
Subtitled The Doctor Who newsletter of Western Australia, , Tim Richards published the first issue of Mentalis in Perth, Australia in 1983, and released 25 issues before the final issue appeared in May 1988.
Contributors of art work included Stephan McArthur.
Tim Richards also edited one issue of Time Loop. In 1986, Richards won the Double Gamma Award for Best Editor.