McLean Hospital is a psychiatric hospital in Belmont, Massachusetts. It is affiliated with Harvard Medical School and has been ranked as the best psychiatric hospital in the United States by U.S. News & World Report. McLean Hospital provides a range of clinical services, including inpatient, residential, and outpatient treatment for individuals with psychiatric disorders. The hospital also conducts research in the field of psychiatry and offers training programs for mental health professionals. McLean Hospital was founded in 1811 and is named after John McLean, a wealthy merchant who donated funds to establish the hospital.