The Land of Oz is a fantasy world introduced in the 1900 children's novel The Wonderful Wizard of Oz written by L. Frank Baum and illustrated by W. W. Denslow.
Oz consists of four vast quadrants: the Gillikin Country in the north, Quadling Country in the south, Munchkin Country in the east, and Winkie Country in the west. Each province has its own ruler, but the realm itself has always been ruled by a single monarch. According to Dorothy and the Wizard in Oz, the ruler has mostly either been named Oz or Ozma. According to The Marvelous Land of Oz, the current monarch is Princess Ozma.