Key Redfield Jamison (born October 14, 1946) is an American psychologist and science writer who is an expert on bipolar disorder.(also known as manic depression), from which she herself suffers.

Her book "Manic-Depressive Illness" (which she co-authored with Frederick K. Goodwin ) is the classic textbook on bipolar disorder.

Jamison is the recipient of the National Mental Health Association's William Styron Award (1995), the American Suicide Foundation Research Award (1996), the Community Mental Health Leadership Award (1999), and was a 2001 MacArthur Fellowhip recipient.

She is currently Professor of Psychiatry at the Johns Hopkins University School of Medicine.

Her works include:

• "An Unquiet Mind" (autobiography), ISBN 0679763309
• "Manic-Depressive Illness" (with Frederick K. Goodwin) ISBN 0195039343
• "Touched with Fire: Manic-Depressive Illness and the Artistic Temperament" (1993) (includes a study of Lord Byron's illness), ISBN 068483183X
• "Night Falls Fast: Understanding Suicide", ISBN 0375701478
• "Exuberance: The Passion for Life" (2004), ISBN 037540144X