The Treatment Outcome Package for children and adolescents (TOP) is a behavioral health and well-being assessment used widely in clinical and child welfare populations. The primary purpose of this study was to examine the concurrent validity of the Child and Adolescent versions of the TOP with the Child Behavior Checklist (CBCL) and the Strengths and Difficulties Questionnaire (SDQ) with a community sample. Children and adolescents (N = 203) 3–18 years of age from a community sample completed the CBCL, the SDQ, and the TOP. Significant correlations emerged between the TOP and theoretically similar scales on the SDQ and the CBCL. Analyses demonstrated that the TOP has excellent concurrent validity on most subscales with both the CBCL and the SDQ. These results provide additional evidence for the TOP’s utility and validity as a measure of psychological well-being and functioning.