This article examines ‘diasporic geopolitics’ as a significant factor in the future of global politics. Whereas discussions of global order in IR have been highly spatialised, we instead highlight the extent to which different regions of the world are entangled via ongoing migration processes, and their legacies in the form of global diasporas. We examine the significance of these interconnections by focusing on rising powers and their relations with the existing international order. Major migration-sending states such as China, India, and Turkey are now aspiring great powers that seek to exert global influence in international affairs. In this context, their diaspora governance policies are also undergoing a transformation, with diasporas increasingly understood as important assets for promoting sending states’ geopolitical agendas and great power ambitions. We examine three mechanisms by which such states exert power transnationally via their diaspora engagement policies. States can treat ‘their’ diasporas as economic assets that facilitate trade and foreign investment; as soft power assets that contribute to the promotion of ‘civilisational’ politics; and as diplomatic assets that can be strategically mobilised or repressed. We conclude by discussing the implications for thinking about the nature of global order and power politics in the coming 50 years.