As co-management often involves resource-using community participation, understanding of what is meant and understood by the concept of community is critical. The chapter therefore begins by recognising the contested nature of the concept of ‘community’, noting critique of assumptions regarding shared interests and priorities, and reflects on different forms of community, how communities may emerge over time and recognition of ‘delocalisation’ of communities in relation to natural resource governance. Different bases of social cohesion are then considered and forms of the related concept of social capital reviewed. Insights from research into how cohesion and social capital influence co-management emphasise the centrality of relationships. Given that co-management may involve multiple and diverse communities, representation of actors is generally necessary. The section on representation considers what representation implies and what bases of representation have been found within the experience of co-management.