This guide highlights the crucial role of community engagement in enhancing public health outcomes, especially within behavioral health initiatives. It outlines evidence-based frameworks and practical tactics for building trust, empowering local voices, and fostering sustainable partnerships among stakeholders. The publication emphasizes inclusive planning, culturally responsive communication, and shared decision-making to boost reach, effectiveness, and equity in health interventions. Drawing on real-world examples, it provides templates and strategies for integrating community engagement into program design, policy advocacy, and evaluation efforts.