This is the result of a study carried out on the activities of the UN in Kenya since independence in 1963. The study’s main objective was to establish the role played by the UN in Kenya’s development history. The study focused on both the ideas and practices, traceable to the UN, that have in one way or the other informed Kenya’s development performance. The study looked at five thematic areas: socio-economic opportunities, agriculture, social security, environmental sustainability and governance. In all of these, it emerged that the UN has played a significant role in Kenya’s development performance, and that in the last four decades, partnership between Kenya and the UN has borne fruit in both ideas and actual development. The contributions of the UN in Kenya's Development has mainly been registered in Health, Agriculture, the environment, governance, as well as security and peace building. Some of these developments have been regional in character.