This study sought to document lifetime experiences of individual categories of victimizations and polyvictimization using the Juvenile Victimization Questionnaire among children from the province of Quebec (Canada) to examine whether polyvictimization predicts mental health symptoms and to assess whether categories of victimization still contribute to mental health symptoms after considering polyvictimization. Polyvictimization accounted for the most variability in scores for depression, anxiety, and anger/aggression compared with individual victimization categories. None of the individual categories of victimization made an independent contribution to the prediction of trauma scores, once polyvictimization was considered.