ObjectiveThis meta-analysis evaluated the efficacy of psychological interventions for adolescents with borderline personality disorder (BPD) across multiple outcome domains, including BPD symptom severity, emotion regulation, depressive symptoms, general psychopathology, and quality of life.MethodsFollowing PRISMA 2020 guidelines (PROSPERO: CRD420261306339), we searched PubMed, PsycINFO, Embase, and Cochrane CENTRAL from inception through January 2026. RCTs of manualized psychological therapies