This thesis is focused on informal sector establishments in Kenya and how they contributes to employment creation, income generation and economic development. The research examines how the informal sector has developed between the years 1986-1989. The study indicates that the informal sector can absorb those people who are unemployed and cannot find jobs in the formal sector. The first chapter describes the definition and interpretation of the informal sector. The discussion of the related .literature, development of the informal sector, politics of the urban informal sector and controversies are described in chapter II. Chapter III describes the regional and sectoral analysis in employment generation. Chapter IV focuses on projections and promotion policies. Concluding remarks and the importance of the informal sector are represented in chapter V.