This First Phase Report on Sierra Leone growth poles is the result of a 9 months consultative process led by the Office of the President which specifically requested that the output of this diagnostic be in an engaging format. The fundamental concept of growth poles is that they exploit agglomeration economies and spillover effects to spread resulting prosperity from the core of the pole to the periphery. At the basis of this theory is the assumption that economic development is not uniform over a region. Rather, it concentrates around a geographic feature or economic hub. In particular, it frequently concentrates around a key industry, around which linked industries develop. A growth pole can be used to nurture direct and indirect linkages from the flagship industry to supporting sectors, which vastly expands the employment generation potential of new investments in said flagship industry. The expansion of this key industry implies the expansion of output, employment, related investments, as well as new technologies and new industrial sectors.