This research reports the role of disaster policy implementation achieving disaster risk reduction (DRR) and sustainable development (SD) in Sierra Leone. The factors were highlighted to help policymakers measure disaster risk perception (DRP), disaster adaptation (DA), community participation (CP), and disaster policy implementation (DPI) towards achieving disaster risk reduction and sustainable development. A questionnaire was administered to collect data from the respondents in six disaster-prone communities (Dwarzarck, Portee-Rokupa, Kroobay, Susan’s Bay, Moyiba, and Colbot) in Freetown, Sierra Leone. Employing the structural equation model approach, we found that all the disaster risk reduction factors (DRP, CP, DA, and DPI) directly influence SD. Furthermore, disaster policy implementation serves as a channel through which disaster risk reduction influences sustainable development. This study suggests to policymakers to use the factors mentioned earlier to design effective disaster policy implementation to achieve disaster risk reduction and sustainable development in Sierra Leone.