Cities among other areas bear the brunt of the impact of climate-related disasters, especially cities that are located in the coastal zone. To build resilient cities, it is necessary to involve disaster risk reduction (DRR) in spatial planning (RTRW) because it has an essential role in both mitigation and adaptation. This research aims to review the implication of disaster mitigation-based RTRW on national security and explore why people stay in disaster-prone areas. Based on the results of research, it can be concluded as follows: disaster mitigation-based RTRW can reduce the risk of exposure to state strategic infrastructures within the national defense domain, and the implementation of disaster mitigation basedspatial planning in DKI Jakarta Province needs to be improved, proven by 17.04% of the built environment is located on the flood-prone with the estimation of 8.169 building units affected by the flood.