This study investigated whether perceived parental support and different parenting styles were related to adherence to diabetes management, metabolic control, and perceived quality of life of adolescents diagnosed with type 1 diabetes. Adolescents between 12 and 18 years of age (N = 102) diagnosed with type 1 diabetes for at least one year participated. Parents were classified into one of four groups (authoritative, authoritarian, permissive, or neglectful) based on their adolescents' surveyed perceptions of their general support and their overall responsiveness and demandingness. Perceived parental support was significantly correlated with adherence. Adolescents who perceived their parents to have authoritative parenting styles also had better adherence to their prescribed treatment plan as well as better perceived quality of life. Adolescents experience better management outcomes when adolescents and parents become interdependent by working together to achieve these outcomes.