Decentralization has become a significant governance reform strategy in post conflict Sierra Leone. However, results from the implementation has been mixed. This study was therefore undertaken to determine the role of decentralization in rural development. The objectives of the study were to identify the role of decentralization in rural development, determine the challenges associated with the implementation process, and to determine what changes have been observed in rural development as a result of decentralization implementation. Data were collected from 410 respondents using stratified random sampling techniques, while a semi-structured questionnaire was administered to obtain quantitative and qualitative responses. A key informant guide was also used to collect information from selected key informants. The data were analyzed using the “R” a widely used statistical tool for data analysis. The results of the study revealed that while decentralization has made some gains in promoting gender equality and service delivery, economic opportunity, poverty reduction and rural water supply remain below average undermining the effectiveness of decentralization implementation in Sierra Leone. To address these challenges, the study recommends that the government establish a transparent and legally protected intergovernmental framework that guarantees adequate fiscal transfers, strengthens accountability and oversight systems, and promotes regular collaboration with clearly defined roles among all levels of governance. These measures would enhance the effectiveness of local councils in delivering public services.