The influence of family functioning on self-concept is crucial in adolescents' development while negative family environment appears to be a risk factor in the development and maintenance of an adolescent's behavior. This study aimed at determining the relationship between family functioning domains, adaptability, and cohesion with five domains of self-concept. The study employed survey research involving the administration of the Family Adaptability and Cohesion Evaluation Scale (FACES III) and the Tennessee Self-Concept Scale (TSCS). A total of 30 male adolescents who participated in a youth development program were involved in this study. Results from correlation and multiple regression analyse indicated positive relationships between domains of family functioning and five domains of self-concept. It was suggested that treatment for family therapy should focus on self-concept and family functioning in an integrative fashion rather than as separate loci. Positive family environment, effective parenting practices, and rebuilding adolescents' self-concept should be incorporated in family-based intervention.