Wicked City is a series of novels written by Hideyuki Kikuchi and published by Tokuma Shoten. Between 2009 and 2010, the first three books in the series were published by Tor/Seven Seas in English. The first book served as the basis for an anime film and live-action film of the same name.

Wicked City is a 1987 Japanese adult animated dark fantasy action horror film produced by Video Art and Madhouse for Japan Home Video. Based on Black Guard, the first novel of the Wicked City series by Hideyuki Kikuchi, the film is the solo directorial debut of Yoshiaki Kawajiri, who also served as the character designer, storyboard artist, animation director and a key animator.