Under the 1974 Juvenile Justice and Delinquency Prevention Act, the Office of Juvenile Justice and Delinquency Prevention (OJJDP) is tasked with sponsoring research and demonstration programs that offer training and technical assistance to States, local governments, and other organizations and agencies working to reduce the problem of juvenile delinquency. OJJDP is comprised of a policy office that provides leadership and coordinates juvenile justice policy at the national level, and three divisions that administer OJJDP’s grant programs. This report presents an overview of the work of the policy office and the three divisions. The Child Protection Division administers programs related to crimes against children and children’s exposure to violence. These programs include Defending Childhood, Internet Crimes Against Children, the National Center for Missing and Exploited Children, AMBER Alert, and Children’s Advocacy Centers. The Demonstration Programs Division provides funds for the development and implementation of programs aimed at preventing, treating, and controlling juvenile delinquency. Programs in this division include the Mentoring Program, Anti-Gang Programs, Second Chance Act Youth Offender Reentry Initiative, the Tribal Youth Program, and the Drug Courts Grant Program. The State Relations and Assistance Division provide funds to States and local governments to improve their juvenile justice systems. Programs in this division include the Formula Grants Program, the Juvenile Accountability Block Grants Program, Enforcing Underage Drinking Laws Program, and the Community Prevention Grants Program. The Office of Policy Development provides assistance and leadership for developing juvenile justice policy at the national level. The various aspects of this office are discussed.