Denny Zeitlin (10 April 1938, Chicago, Illinois) is an American jazz pianist and composer, and a clinical professor of psychiatry at University of California, San Francisco. He has recorded more than 30 albums, including more than 100 original compositions, and was a first place winner of the Down Beat International Jazz Critics Poll in 1965 and 1974. Zeitlin grew up in the Chicago suburb of Highland Park. He began improvising on the piano at age two and was composing before elementary school. His father was a radiologist who played piano by ear.