Identifying suicide risk among young people is a critical component of the comprehensive approach that the juvenile justice system must adopt to prevent suicide. Ideally, this identification is done with research-based screening and assessment instruments. To select effective instruments, it is necessary to be aware of the juvenile justice system’s responsibilities in preventing suicide, the contexts in which screening and assessment instruments are used, current standards for screening instruments and assessment tools used in mental health and juvenile justice settings, and specific instruments that are available to advance suicide prevention efforts.