Transgender in adolescence is currently a widely discussed topic, additionally reflected by an increasing prevalence in clinical practice. The present review of the available literature on transgender, trans* , gender dysphoria or gender incongruence in youth reports results on the long-term results of medical interventions for the psychological well-being, prevalence, referral rates and sex ratio, developmental pathways, current developments and the role of the social environment. Finally, implications for clinical care and future research will be discussed.