Princess Ozma (b. August 21, year unknown) is a fictional character in the Land of Oz universe created by L. Frank Baum. She appears in every book of the series except the The Wonderful Wizard of Oz (1900).
The daughter of the former King of Oz, King Pastoria, Ozma was given to the witch Mombi by the Wizard of Oz, who worried she would someday challenge his illegitimate rule as Oz's defacto dictator. Mombi transformed the infant Ozma into a boy and called him Tip (short for Tippetarius). Ozma, in the form of Tip, was raised as a boy and had no memory of ever having been a girl. As Tip, Ozma created Jack Pumpkinhead. In The Marvelous Land of Oz, Glinda the good witch forced Mombi to transform the boy Tip back into Ozma, and she was installed as Oz's ruler (although many realms within Oz were and remain unaware of her authority).