In recent years social network analysis has been used for research and action in community contexts. Specifically, the social network analysis has been used in program evaluation, participatory governance, the selection of health agents, participatory sociograms and involvement of key players in the intervention. Network analysis is also part of strategies for empowerment, community mediation, community coalitions and dissemination of preventive messages, among others. In this monograph some of these issues are present, with studies of inter-organizational networks to provide services; chains of researchers and professionals in the transference of science into practice; the structure of personal networks in community settings; as well as social support resources. In the introduction to the monograph we reflect on the potential of network analysis in the context of social and community intervention.