The rate of bullying among children is a key indicator of children’s well-being and an important marker for comparing global social development: both victims and perpetrators of bullying in childhood suffer across various dimensions, including personal social development, education, and health, with negative effects persisting into adulthood. For policymakers and professionals working with children, high rates of bullying amongst children should raise warning flags regarding child rights’ failings. Moreover, bullying amongst school-aged children highlights existing inefficiencies in the social system, and the potential for incurring future social costs in the communities and schools in which children live their lives. Inevitably, these concerns have contributed to bullying becoming a globally recognized challenge – every region in the world collects information on children’s experiences of bullying. Yet, despite the identification and monitoring of bullying having global appeal, so far, a validated global measure has not been produced. To fill this gap in knowledge, this paper develops a global indicator on bullying amongst children using existing school-based surveys from around the world. The findings of this paper show that bullying is a complex phenomenon that takes multiple forms, and is experienced to widely varying degrees across the world.