Social networks are structures composed of relational patterns of interactions among a set of actors. These actors may be individuals, families, groups, or organizations connected through expressed ties that allow information and resources to flow through the network. Considering a social network approach in research and practice shifts the focus from the attributes of actors within the network to the relations between them. In understanding how the relational ties influence issues of concern, we may better understand phenomena and devise targeted interventions effectively and efficiently. In this article we discuss the types of social networks, provide an overview of social network analysis, use social capital to contextualize the effects of networks, and provide implications of social networks for social work research and practice.