Our aim was to evaluate longitudinal data for adolescents who were treated with Dialectical Behavior therapy (DBT) skills groups having been previously diagnosed with depressive disorder. Intervention with an observational cross-sectional design was implemented to evaluate the treatment outcome of a 10-week DBT skills groups with female adolescents with depression. After the patients were identified for enrollment, parents and adolescents were evaluated with psychometric measurements pre-, post-intervention, and at one-year follow-up. Repeated measures analysis was undertaken with the Child Depression Inventory (CDI), Pediatric Quality of Life Inventory (PedsQL) and Strengths and Difficulties Questionnaire (SDQ) for participants. Statistical significance was detected for self-report CDI scores and both self-report and parent SDQ and PedsQL scores. This study is the first DBT intervention in Turkish children, shows that a group DBT skills groups training can be adapted and put into practice successfully with depressed Turkish adolescents.