King Pastoria is a fictional character mentioned in the Oz books by American author L. Frank Baum. He was the rightful ruler and King of the undiscovered Land of Oz, but was mysteriously removed from his position when the Wizard of Oz unexpectedly came to the country and took the throne, proclaiming himself as the new dominant ruler of Oz. Shortly after, Pastoria's only child and heir, Princess Ozma, suddenly vanished, leaving not a single clue of her whereabouts.

The Marvelous Land of Oz: Being an Account of the Further Adventures of the Scarecrow and the Tin Woodman, commonly shortened to The Land of Oz, published in July 1904, is the second book in L. Frank Baum's Oz series, and the sequel to The Wonderful Wizard of Oz (1900). This and the following 34 books in the series were illustrated by John R. Neill.