The Wicked Witch of the West is a fictional character who appears in the classic children's novel The Wonderful Wizard of Oz (1900), created by American author L. Frank Baum. In Baum's subsequent Oz novels, it is the Nome King who is the principal villain; the Wicked Witch of the West is rarely even referred to again after her death in the first book.

Wicked is a musical with music and lyrics by Stephen Schwartz and a book by Winnie Holzman. It is a loose adaptation of the 1995 Gregory Maguire novel Wicked: The Life and Times of the Wicked Witch of the West, which is in turn based on L. Frank Baum's 1900 novel The Wonderful Wizard of Oz and its 1939 Metro-Goldwyn-Mayer film adaptation.