Harsh parenting is associated with adolescent mental health concerns. Peer relationships also importantly influence adolescent mental health outcomes. Although the direct associations between harsh parenting, peer relationships, and adolescent outcomes have been empirically established, less is known about the extent to which peer relationships mediate the associations between harsh parenting and adolescent outcomes. This study tested the links between harsh parenting, peer relationships, and adolescent outcomes among families at-risk for child maltreatment. With a sample of caregivers and adolescents (n = 218), the results of mediation analyses indicated that peer aggression partially mediated the pathway between harsh parenting and externalizing symptoms of both females and males. Additionally, peer rejection partially mediated the links between harsh parenting and internalizing symptoms of both females and males and peer rejection also was a partial mediator of male externalizing symptoms. [ABSTRACT FROM AUTHOR]