Dr. Dorothy Lewis is an American psychiatrist specializing in the study of serial killers. Dr. Lewis has worked with death row inmates. She is a psychiatry professor at Yale and New York universities and is the co-author of Guilty by Reason of Insanity, a book she wrote with neurologist Jonathan Pincus.

In 2004, she alleged that portions of British playwright Bryony Lavery's hit Broadway play Frozen were plagiarized from Lewis' book.