This study assessed the mangrove forest in Barangay Dao, San Jose N. Samar, Philippines, focusing on its diversity, community structure, and ecological significance. The transect line plot method was used to sample and assess mangrove species in the study area, while participatory resource appraisal was conducted to gather information on their major uses and recommended conservation measures. Physico-chemical characteristics were measured on-site, except for salinity which required laboratory analysis. The study revealed that the mangrove forest in Barangay Dao, San Jose N. Samar, is environmentally and economically important to the community. Mangroves provide natural infrastructure, protecting the land and people from erosion, waves, storms, tsunamis, and floods. Charcoal production emerged as a significant utilization of mangroves. The study identified eight species belonging to five families, with Rhizophora apiculata (Bakauan lalaki) being the most abundant, while Ceriops decandra (malatangal) and Aegiceras corniculatum (saging-saging) were regenerating species in the area. The community structure analysis revealed a total of 594 individuals across the representative plots, with Rhizophora apiculata exhibiting the highest density. Overall, this study provides valuable insights into the diversity, community structure, and ecological significance of mangrove forests in Barangay Dao, San Jose N. Samar. The findings contribute to the development of conservation and management strategies for these crucial ecosystems, highlighting the need for their protection and sustainable utilization for the benefit of both the environment and the local community.