Louis Jolyon "Jolly" West (October 6, 1924 – January 2, 1999) was an American psychiatrist whose work focused particularly on cases where subjects were "taken to the limits of human experience".
He performed Jack Ruby's psychiatric evaluation, and he was in charge of UCLA's department of psychiatry and the Neuropsychiatric Institute for 20 years.
He was also active in anti-death penalty activism.