Mental Health Juvenile Justice Act

Mental Health Juvenile Justice Act - Amends the Juvenile Justice and Delinquency Prevention Act of 1974 to direct the Administrator of the Office of Juvenile Justice and Delinquency Prevention to make grants to train State juvenile justice system officers and employees regarding appropriate access to mental health and substance abuse treatment services for juveniles.

Directs: (1) the Attorney General and the Secretary of Health and Human Services to make grants to partnerships between State and local or county juvenile justice agencies and State and local mental health authorities for programs that provide for appropriate diversion of juveniles from incarceration and for mental health screening and treatment; and (2) the Secretary to make grants to monitor mental health and special education services to, and to advocate on behalf of, juveniles.

Amends the Public Health Service Act to direct the Attorney General and the Secretary to award competitive grants to eligible entities for programs that address the service needs of juveniles and of juveniles with serious mental illnesses through diversion and treatment services including for juveniles on probation, on parole, or discharged.

Establishes a Federal Coordinating Council on Criminalization of Juveniles With Mental Disorders.

Requires a State, to be eligible for funds under the violent offender incarceration and truth-in-sentencing grants program, to have (by January 1, 2003) a program of mental health screening and treatment for appropriate categories of offenders during periods of incarceration and supervision that is consistent with guidelines issued by the Attorney General. Makes Federal criminal code provisions regarding appropriate remedies with respect to prison conditions applicable to a civil action that seeks to remedy conditions which pose a threat to the health of individuals who are under age 16 or mentally ill.