Treatment fidelity is an essential outcome of implementation research. The gold standard measure for Cognitive-Behavioral Therapy (CBT) fidelity is the Cognitive Therapy Rating Scale (CTRS). Despite its widespread use in research and training programs, the structure of the CTRS has not been examined in a sample of community mental health clinicians with adult and child clients. The current study addressed this gap. The sample consisted of 355 clinicians and 1298 CBT sessions scored using the CTRS. High interrater reliability was observed and factor analysis yielded separate structures for child and adult treatment sessions. These structures were not consistent with previous factor analyses conducted on the scale. Findings suggest that the CTRS is a reliable measure of CBT in community mental health settings but that its structure may depend on the clinical population measured. Additionally, the factor structure can provide guidance for delivering feedback in training and supervision settings.