This StateScan publication is the 6th in a series that distills important knowledge from NCJJ’s new Juvenile Justice Geography, Policy, Practice & Statistics website. The authors organize results from an online search for available state-level recidivism reports. Most reports located focused on juvenile correction populations, but 14 reports were reviewed that included measures of reoffending for youth under probation supervision. This publication explores the different ways reoffending is measured for this population, including the various marker events and follow up periods used. This original analysis also emphasizes the need to measure reoffending among probationers given that most court-involved youth are served by probation departments.