Children with attention-deficit/hyperactivity disorder (ADHD) often experience higher rates of emotion regulation deficits and peer victimization relative to unaffected children; however, few studies have examined the extent to which emotion regulation is associated with peer victimization among children with ADHD. The current study proposed a model whereby ADHD was directly and indirectly related to peer victimization through emotion regulation, and that emotion regulation directly predicted peer victimization above and beyond the effect of ADHD. Two hundred ten children (133 ADHD, 77 non-ADHD) enrolled in the present study. Parents completed measures to assess ADHD diagnostic status, and parents and children completed measures of emotion regulation and peer victimization. Model testing strongly supported the direct association of emotion regulation on peer victimization for children with and without ADHD, and also provided support for an indirect effect of ADHD on peer victimization through emotion regulation. Using a multi-informant approach, the current study demonstrated that emotion regulation directly effects peer victimization among children with and without ADHD and indirectly effects the relation between ADHD and peer victimization. For all children, the inability to regulate and cope with emotions appears to play a powerful role in the frequency with which they experience peer victimization, and for children with ADHD, increased rates of peer victimization are likely attributable to co-occurring deficits in emotion regulation.