The Vortex is a play in three acts by the English writer and actor Noël Coward. The play depicts the sexual vanity of a rich, ageing beauty, her troubled relationship with her adult son, and drug abuse in British society circles after the First World War. The son's cocaine habit is seen by many critics as a metaphor for homosexuality, then taboo in Britain. Despite, or because of, its scandalous content for the time, the play was Coward's first great commercial success.
The play premiered in November 1924 in London and played in three theatres until June 1925, followed by a British tour and a New York production in 1925–26. It has enjoyed several revivals and a film adaptation.