The Crimson Circle (German: Der rote Kreis) is a 1929 British-German sound part-talkie crime film directed by Frederic Zelnik and starring Lya Mara, Fred Louis Lerch, and Stewart Rome. In addition to sequences with audible dialogue or talking sequences, the film features a synchronized musical score and sound effects along with English intertitles. The sound was recorded via the De Forest Phonofilm sound-on-film process. The film is an adaptation of the 1922 Edgar Wallace novel The Crimson Circle in which Scotland Yard detectives battle a gang of blackmailers. A previous UK version was filmed in 1922.

The film, a co-production between British International Pictures and Efzet Film. In March 1929, this film and The Clue of the New Pin, filmed in the British Phototone sound-on-disc process, were previewed in London. As with most early sound films, a silent version was edited down from the sound version for release to theatres that had not yet converted to sound.