The Secret Kingdom

The Secret Kingdom may refer to:


 * The Secret Kingdom (film), a 1925 British silent fantasy and science fiction film
 * The Secret Kingdom (novel), a 1938 novel by Walter Greenwood
 * The Secret Kingdom (TV series), a 1960 British television series based on the novel
 * Das geheime Königreich (The Secret Kingdom), an opera by Ernst Krenek
 * Secret Kingdom, a song from the 1976 British musical The Slipper and the Rose