STREET-BASED ENTREPRENEURSHIP Entrepreneurship is a relatively new academic subject area in spite of its practice for centuries by most civilizations worldwide. Street-based entrepreneurship is least considered as an integral part in the overall development of entrepreneurship. Yet millions of people create new ventures on the street. This study examined the factors influencing street-based enterprise performance in Nakuru and Eldoret municipalities, Kenya. It discerned to enhance an understanding of the complex interaction between the street-based entrepreneurial potential and environmental constraints with enterprise performance. The phenomenal growth of street-based enterprises in spite of formidable constraints is an appeal to the important role which these enterprises continue to play in the fast growing urban sector in developed and developing countries.However, the performance of street-based enterprises is little known and these category of enterprises continue to be marginalized leading to a situation of increasing misery for the participants. measures should therefore be undertaken by stakeholders to mainstream street-based enterprises in the Kenyan economy.