Tyrann was a science fiction fanzine by Nobert Hirschorn, published in New York, New York, U.S.A.
At least four issues of this hektographed fanzine appeared in the 1950s. The first three issues were edited by Hirschorn with Henry Ebel. The Assistant Editor was Richard Bergeron, who later went on to publish his own fanzine, Warhoon.
Art work is by Richard Bergeron and Max Keasler.
Included in the fanzine are an editorial by Hirschorn, articles, fiction, poetry, fanzine reviews, and a letters column.