This systematic review synthesised evidence on the impact of yoga on body image outcomes among children and adolescents (≤ 19 years). Comprehensive searches of nine databases, preprint servers, trial registries, and conference proceedings (inception–October 2025) identified studies that examined yoga-based interventions or yoga practice in relation to body image. Eleven studies ( N = 1082) met inclusion criteria, one of which was a qualitative study. Interventions were delivered in school settings and ranged from short-duration yoga classes to multi-component programmes. Across yoga-only interventions, effects on body image were generally positive but small and inconsistent. Improvements were observed for body satisfaction, body esteem, and reductions in body surveillance, though findings for body appreciation, physical self-worth, and stress-related body image were mixed. Multi-component interventions demonstrated more consistent benefits, including reductions in body dissatisfaction, drive for thinness, and (in some studies) bulimia risk factors, as well as increases in social self-concept and self-care. Qualitative evidence highlighted greater bodily awareness, self-respect, emotional regulation, and healthier lifestyle choices as possible mechanisms of change. However, the overall evidence base was limited by small sample sizes, heterogeneity in body image measures, and a lack of follow-up assessments. Additionally, most studies relied on predominantly female and White samples, restricting generalisability. Overall, findings suggest that interventions integrating yoga with structured reflection, psychoeducation, and group discussion show the most consistent promise for improving body image. Current designs do not allow the unique contribution of yoga to be isolated. Further high-quality research is required to clarify effectiveness, mechanisms, and long-term outcomes. • Mixed-methods review of yoga’s impact on body image in youth across 11 studies. • Yoga-only interventions produced small, mixed improvements in body image. • Multi-component programmes showed the most consistent body image benefits. • Evidence quality was low, and studies lacked follow-up and diverse samples. • Yoga may support youth body image, but redevelopment and robust trials are urgently needed.