Scholars in international political economy are increasingly interested in how the sub- national patterns of major economic adjustments such as trade investment and environmental reforms fuel public opposition to international institutions that are meant to catalyze those adjustments. While the literature has sharpened the understanding of material policy costs and their implications for public opinion, the impact of less material considerations—for example, specific subnational identities—is still largely unexplained. In this paper, we explore if and how vulnerability to climate policy, which pushes communities to lash out against rapid decarbonization, is moderated by a sense of strong regional identities, which may reduce the appreciation for national policies at the expense of international ambition. We present new survey evidence from the United Kingdom that assesses if and how communities with different sensitivities to distributive climate policy costs and subnational identities form varying preferences for international cooperation. Our study of 3,000 individuals from three different geographically targeted areas supports our argument and highlights the importance of new climate-related cleavages among politically relevant constituencies on international integration.