School engagement has been identified as an important construct associated with student achievement, school completion, and more recently, student well-being. The present study included data from 200 ninth grade students of diverse ethnic groups (African American, Hispanic, & White) to explore dimensions of student wellness and their association with student engagement in school. Adolescents completed the Child and Adolescent Wellness Scale (CAWS) and the Student Engagement in School Questionnaire (SEQ). Results revealed that students viewed themselves positively on both measures, the two measures demonstrated adequate internal consistency, and all 10 dimensions of the CAWS were significantly related to student engagement in school. The current study provides support for dimensions of wellness contributing to measured student engagement in school, and discusses the potential of wellness concepts contributing to school mental health.