Claire Dux (2 August 1885 – 8 October 1967) was an operatic and concert soprano with a successful career in continental Europe, England, and the United States.

Clara Auguste Dux was born in the village Witkowo in the county of Gnesen (today Gniezno); that area was part of the Kingdom of Prussia's Province of Posen from 1815 until 1920.

Other roles in Cologne included Mimì in Puccini's La bohème, and she gained international reputation through European tours.

In 1921, she became a member of the Chicago Civic Opera where she debuted as Nedda in Leoncavallo's Pagliacci; she remained there for the rest of her career, although she returned to Europe occasionally as a guest artist.

Dux was married three times: first to a writer, Wilhelm Alfred Imperatori, then briefly to the German actor Hans Albers.