Populations in post-conflict settings often have increased healthcare needs, residing in settings where basic services needed to maintain good health may be non-existent or hard to access. Therefore, there is a need for better identification and reallocation of resources as part of the post-conflict health rehabilitation effort. Assets can be described as the collective resources that individuals and communities have at their disposal, which protect against adverse health outcomes and promote health status. This study applies an asset-based approach to explore the most optimal design of health services and to identify the resource constraints for basic health service delivery to the most vulnerable communities in eastern Congo. We implemented the asset mapping in two phases. Firstly, we combined a qualitative survey with community walks to identify the assets already present in the communities. Secondly, we conducted group discussions to map out assets that are the core of asset-based community development (ABCD) practice. We finally documented all assets in a Community Asset Spreadsheet. Overall, 210 assets were identified as available and potentially valuable resources for the communities in eastern Congo. Among them, 57 were related to local associations, 23 to land and physical environments, 43 to local institutions, 46 to individuals, 35 to economy and exchange, and only 6 to culture, history, and stories. Drawing upon the findings of the qualitative survey, community walks, and group discussions, we concluded that an important number of resources are in place for basic health service delivery. By activating existing and potential resources, the most vulnerable populations in eastern Congo might have the required resources for basic health service delivery. Our findings support the use of an asset-mapping research method as appropriate for identifying existing and potential resources for basic health services in a post-conflict setting.