Statistics are organized according to: youth crime; youth in the juvenile justice system--(juvenile court system, referral, and adjudication; juvenile detention and corrections; youth in the adult criminal justice system--transfer, and adolescent brain development; housing youth in adult jails and prisons--jails, prisons, safety issues, sexual assault, and mental health; racial and ethnic disparities--African-American youth, Latino youth, and Native youth; family involvement; and cost-effective alternatives.