Using information available from the longitudinal Children in Community Study, population-attributable risk percentage was calculated to estimate the amount of failure to complete secondary school in the United States that is associated with adolescent psychiatric disorder. Over half the adolescents in the United States who fail to complete their secondary education have a diagnosable psychiatric disorder. The proportion of failure to complete school that is attributable to psychiatric disorder is estimated to be 46%. School failure among young persons with psychiatric disorder exacts a large toll from individuals and society.