The Medium is a short (one-hour-long) two-act dramatic opera with words and music by Gian Carlo Menotti. Commissioned by Columbia University, its first performance was there on 8 May 1946. The opera's first professional production was presented on a double bill with Menotti's The Telephone at the Heckscher Theater, New York City, February 18–20, 1947 by the Ballet Society. The Broadway production took place on May 1, 1947, at the Ethel Barrymore Theater with the same cast.

In 1951, Menotti directed, with the help of filmmaker Alexander Hammid, a film version made to resemble film noir, and starring Marie Powers as Madame Flora and Anna Maria Alberghetti as Monica. A live television production starring Marie Powers took place on 12 December 1948 on the TV series Studio One.

It was also filmed for Australian TV in 1960.