A New Zealand study has highlighted elevated levels of poverty, trauma, and mental health distress amongst adolescents appearing in the Youth Court compared with their high school peers. The study examined 17-year-olds in youth justice (YJ) between 2019 and 2021, and 17-year-olds in the Youth19 survey (Y19). Exposure to family violence, parental separation, and child protection were all greater in the YJ population compared with the Y19 population. In addition, the YJ population was more likely to have depressive symptoms (odds ratio [OR] 10.5; p < 0.0001), suicidality (OR 7.8; p < 0.0001), and cannabis use (OR 3.2; p < 0.001) compared with the Y19 population, and Māori males were disproportionately affected.