Using longitudinal data on 1,813 children and parents from a nationally representative child-welfare sample, National Survey of Child and Adolescent Well-Being (NSCAW), this study investigated physically abusive and neglectful parenting as mediating the effects of parent depression on child mental health by developmental stage. Findings from latent growth models indicated that parental depression had a significant impact on child outcomes for all youths, but of the 2 types of parenting behaviors, only neglectful parenting mediated the relationship for preschool and school-aged children. Neither parenting behavior mediated the effects of parental depression for adolescents. (Contains 5 tables and 1 figure.)