Chapter 23 focuses on network analysis, a method based on graph theory and statistics, which provides a rigorous, systematic approach to studying how relations and their structuring influence social-ecological systems (SES). The chapter discusses how different network analysis metrics, including centrality, diameter, clustering coefficient, density and reciprocity, can be used to understand SES questions. It goes on to discuss the types of SES problems and research questions commonly addressed by this set of methods, as well as their limitations, resource implications and new emerging research directions. The chapter also includes an in-depth case study showcasing the application of network analyses, and suggested further readings on these methods.