Dr. Lester Grinspoon (born June 24, 1928) is Associate Professor Emeritus of Psychiatry at Harvard Medical School. Grinspoon was senior psychiatrist at the Massachusetts Mental Health Center in Boston for 40 years. Dr. Grinspoon is a fellow of the American Association for the Advancement of Science and the American Psychiatric Association. He was founding editor of The American Psychiatric Association Annual Review and Harvard Mental Health Letter. Grinspoon was editor of Harvard Mental Health Letter for fifteen years.