Background: A client's motivation to receive services is significantly related to seeking services, remaining in services, and improved outcomes. The Motivation for Youth Treatment Scale (MYTS) is one of the few brief measures used to assess motivation for mental health treatment. Objective: To investigate if the psychometric properties of the MYTS previously found for youth receiving outpatient treatment would be replicated in a sample of youth entering residential care. Methods: The study was conducted at a large residential group care agency in the Midwest with 145 youth who completed the 8-item MYTS upon intake into the group homes. To investigate the psychometrics of the MYTS, we used classical test theory, Rasch modeling, and confirmatory factor analysis approaches. Results: Most of the psychometric properties were strong and replicated previous research in outpatient settings. The primary divergent finding was that the two subscales, problem recognition and treatment readiness were not significantly correlated in the residential sample, in contrast to the moderate correlations found in outpatient samples. Conclusions: The MYTS can be recommended for use in residential settings, however, researchers and practitioners should carefully examine the sub-scale scores. Future research needs to replicate these findings in residential settings and further explore why the two subscales are minimally correlated.