Vertical Horizons was a science fiction fanzine published by the Vertical Horizons groups and edited by Rosemary G. Simmons.
Published in new South Wales, Australia, Vertical Horizons first appeared in 1952 and was published till 1953, with five issues released. The Vertical Horizons group consisted of women who were writing, and reading science fiction.
Contributors included L.M. Chalmers, Norma Hemming, Laura Molesworth, Rosemary Simmons, and Norma Williams.