Part of the Office of Justice Programs, U.S. Department of Justice, OJJDP's mission is to strengthen the juvenile justice system's efforts to protect public safety, hold offenders accountable, and provide services that address the needs of youth and their families.
OJJDP's Statistical Briefing Book contains a frequently asked questions (FAQ) page addressing jurisdictional boundaries, organization and administration of delinquency services, and state provisions for trying juveniles as adults.
Answer links lead to tables listing correlating information for all 50 states
NCJJ is the research division of the National Council of Juvenile and Family Court Judges and is the oldest juvenile justice research group in the United States, having conducted national and sub national studies on crime and delinquency since 1973. The Center has several ongoing research projects at the national level. Check the Publications listing for a variety of reports.