The Assassination Bureau Limited (also known The Assassination Bureau in the United States) is a 1969 British Technicolor black comedy adventure film, produced by Michael Relph, directed by Basil Dearden, and starring Oliver Reed, Diana Rigg, Telly Savalas, and Curd Jürgens. It was released in the U.S. by Paramount Pictures and is based on Jack London's unfinished novel, The Assassination Bureau, Ltd, posthumously published in 1963. Unlike the novel, which is set in the United States, the film is set in Europe.

The Assassination Bureau Limited was the penultimate film of Basil Dearden.

The film is set in the Edwardian era. In the film, a female journalist commissions the assassination of the chairman of an organization of assassins. The chairman challenges the members of his organization to kill him. If they fail, he will kill them. He is orchestrating a purge of his organization's senior members.