Emmeline is an opera in two acts composed by American Tobias Picker with a libretto by J. D. McClatchy. Picker's first opera, it was commissioned by the Santa Fe Opera company and premiered in 1996. Based on Judith Rossner's novel of the same name, Emmeline is an American retelling of the Oedipus myth from the mother’s viewpoint. In 2009, a chamber version of Emmeline was created for the Dicapo Opera. In 2015, Opera Theatre of Saint Louis mounted a major new production of Emmeline that won universal acclaim.