The World Bank has supported Kenya in financing development projects in transport, energy, water, urban development, health, public sector management and social protection since 1960. By November 2011, it had financed more than 175 projects with a total investment of over US$ 7,070 billion. Sustainability of the funded projects is of utmost importance if the impact of funding these projects is to be realized. Despite project feasibility studies being done prior to commencement of the projects, sustainability is still not guaranteed. This study investigated the determinants of sustainability of World Bank funded projects in Kenya, with the specific objectives being: to determine the institutional, technical, political and economic factors that influence sustainability of World Bank funded projects in Kenya.