This article reviews research on the development of emotion regulation in adolescence. The role of biological, social learning, and other environmental factors such as the family environment set the stage for the development of emotion regulation processes in childhood. Adolescence is a time of increasing stress, making emotion regulation particularly challenging. We review how brain development, puberty, stress, and the peer context may contribute to difficulty in effectively regulating emotion during this developmental period. Finally, we discuss some of the more common forms of emotion dysregulation in adolescence. Throughout this article, we consider impacts of contextual factors such as the Covid-19 pandemic, stigma, and structural racism on these processes.