This toolkit, How to Mobilize Communities for Health and Social Change, provides practical guidance for engaging communities to drive sustainable improvements in health and well-being. Grounded in evidence-based social and behavior change strategies, it outlines a step-by-step approach to community mobilization, emphasizing local leadership, participatory decision-making, and collective action. The toolkit equips health practitioners, development workers, and community leaders with tools to assess needs, foster collaboration, and implement tailored interventions that address pressing health and social challenges. By empowering communities to take ownership of change, it supports long-term impact and resilience in diverse settings.