Technological advances in recent decades have enabled an unprecedented level of surveillance by the government and permitted law enforcement to gather, store, and retrieve in real time enormous amounts of data. After nearly a century of limited recordmaking and enhanced confidentiality regarding juveniles, these data collection practices have quickly expanded to include youth. This Article uncovers the vast extent of modern data collection and distribution about juveniles by the criminal justice system from juvenile sex offender registration and their inclusion in gang and DNA databases, to schools turned into mandated law enforcement informants, to police and courts increasingly sharing juvenile records with employers, public housing authorities, colleges, and the general public.