The Substance Abuse and Mental Health Services Administration (SAMHSA) is the agency within the U.S. Department of Health and Human Services that leads public health efforts to advance the behavioral health of the nation. SAMHSA's mission is to reduce the impact of substance abuse and mental illness on America's communities.

A component of the Office of Justice Programs within the U.S. Department of Justice, OJJDP works to prevent juvenile delinquency, improve the juvenile justice system, and protect children.