Janis Siegel (born July 23, 1952) is an American Jazz singer with the vocal group The Manhattan Transfer (1972–present).
In 1965 Siegel recorded with a group called Young Generation on Red Bird records. In 1972 the original Manhattan Transfer had disbanded, and founder Tim Hauser re-formed the group with different singers, including Siegel. This incarnation of the group has enjoyed international popularity, covering songs from the 1930s through the 1980s in a variety of genres including jazz fusion, R&B, pop, and doo wop. The group has received 10 Grammy Awards during Siegel’s ongoing tenure, and was inducted into the Vocal Group Hall of Fame in 2003.