This report provides statistics about juveniles in the criminal justice system, whether handled as adults in criminal courts or handled in juvenile courts. In the 75 largest U.S. counties, juveniles transferred to criminal courts represented about 1% of all felony defendants. Two thirds of juveniles transferred to criminal court were charged with a violent offense, including 11% charged with murder. Of the juveniles transferred to criminal courts, 63% were black males, 29% were white males, 3% were black females, and 2% were white females. Fifty-nine percent of the juveniles transferred to criminal court were convicted of a felony, and 52% of those convicted of a felony were sentenced to prison. The average prison sentence was about 9 years. Of juveniles formally processed in juvenile courts, 48% were white males; 36%, black males; 7%, white females; and 5%, black females. Fifty-five percent of juvenile defendants formally processed in juvenile courts were adjudicated delinquent. Of these juveniles, 40% received a disposition of residential placement, and 50% received formal probation. The methodology used to develop the statistics is discussed. Four appendixes discuss judicial processing of young offenders, estimating the number of juveniles handled in adult courts, juveniles adjudicated as adults in the federal system, and the jurisdictions used in two major samples of juvenile defendants. (Contains 14 tables.) (SLD)