Growing research highlights the role of local community contexts in health and well-being. Communities function as central arenas for health promotion as individuals and community spaces interact in daily life. To better communicate the linkages between community and health, we demonstrate the use of a set of geosocial tools for community diagnosis and health promotion, conceptually grounded in the framework of geosocial embeddedness, using data from community surveys and participatory research conducted with local inhabitants to engage their competency. Through a web-based interactive map generated using a geographic information system, we identified public territories in the municipality where greater policy attention is needed to enhance health. Through an intersectional matrix produced using multilevel analysis, we identified precise social groups by intersectional categories that are most at risk of loneliness for targeted intervention. A health radar chart on multidomain indicators illustrated information on group dynamics and longitudinal comparisons for health promotion. Overall, these tools offered not only diagnoses of the most vulnerable social groups for tailored interventions but also insight for policymakers to improve infrastructure and material resources to promote health. We conclude that geosocial tools offer a promising approach toward sharpening health communication and improving health in the community.