Among the baseline cohort (2000) of 44,489 young offenders between the ages of 10 and 17 years, the 1-year reoffending rate was 43.3 percent. In 2004, the rate of 1-year reoffending among 47,619 young offenders decreased to 41.3 percent, representing a 1.4 percent decrease between 2000 and 2004. Since 1997, 1-year reoffending among juveniles decreased 3.8 percent. Reoffending rates are presented by age, offense type, case disposal type, and offense history. Findings revealed that older juvenile offenders were significantly more likely to reoffend than their younger counterparts. Juveniles sanctioned for absconding or bail offenses, theft from vehicles, and other motoring offenses had higher reoffense rates than juveniles sanctioned for other crimes. Approximately 80 percent of juvenile offenders who have eight or more previous criminal justice sentences reoffend within 1 year. The report presents the strategy used to measure reoffending and describes the targeted reductions in reoffending sought by the Home Office. Data were gathered from the Home Office Police National Computer and the Prison Service's Inmate Information System and was analyzed using logistic regression models. Tables, figures, annex, references