As part of the efforts of the Food and Agriculture Organization of the United Nations (FAO) to support and strengthen NARS' research impacts and their links to extension service systems, the present assessment was conducted in Liberia to establish deeper insight into these challenges and opportunities. The results presented in this comprehensive report can be used to support the development and adoption of guidelines for use by the NARS. The present study was undertaken to assess the implementation of AR4D in Liberia and the key actors involved to better understand the performance and the institutional linkages amongst them and other relevant institutions to help identify potentials for fulfilling the agricultural research for development needs of the country with the over-arching goal of supporting small-scale farmers