Significance Effective environmental policy requires public participation in management, typically achieved through engaging community defined by residential location or resource use. However, current social and environmental change, particularly increasing connectedness, demands new approaches to community. We draw on place attachment theory to redefine community in the context of Australia’s Great Barrier Reef. Using a large dataset on place attachment, our analysis of local, national, and international stakeholders identified four communities differing in their attachment to the reef and spanning location and use communities. Our results suggest that place attachment can bridge geographic and social boundaries, and communities of attachment could thus be leveraged to foster transnational stewardship, which is crucial to addressing modern sustainability challenges in our globalized world.