There is convincing evidence that many young people who are in the justice system have had contact with child protection services and that victims of childhood maltreatment are at increased risk of subsequent youth justice involvement. In Australia, however, there have been few longitudinal studies that have examined these associations and relatively less is known in this area. This study examines the overlap between the child protection and youth justice involvement in South Australia, and determines how substantiated maltreatment and variations in these experiences (e.g., the type, timing and recurrence of maltreatment) relate to criminal convictions as a youth. The results show that although the majority of child-protection involved youth do not become convicted offenders, the odds of subsequent convictions are significantly greater both for those with notifications and substantiated maltreatment and for those who had been placed in out-of-home care. Multivariate analyses revealed that the strongest predictors for receiving a conviction among maltreated youth were: male gender, Aboriginal and Torres Strait Islander ethnicity, experiences of physical abuse and emotional abuse, a greater number of substantiations (recurrence), experiencing maltreatment that commenced in childhood and continued into adolescence, and placement in out-of-home care. The mechanisms through which maltreatment might be linked with behavior are then considered, along with directions for future research in this area. (C) 2016 Elsevier Ltd. All rights reserved.