Abstract: The study focused on identifying the factors that influence adoption of electronic procurement in Kenyan public sector. The research used selected government agencies. The study intended to investigate to which extent the following independent variables namely; E-security, staffing, user acceptance and top management support influence adoption of electronic procurement in Kenyan public sector. Descriptive research design was adopted for the study where all the government agencies (122) that are registered in Kenya formed the target population for the study. The study considered a sample of 18 government agencies in Kenya from which 54 respondents were purposively selected. Questionnaires were used to collect primary data from procurement managers and procurement officers. From the study, it was noted that E-procurement has not been fully adopted by all the government agencies. Top management support and E-security are the major influence of E-procurement adoption in Kenyan public sector. The study recommended that Top management support among the parastatals in Kenya should set goals, strategies and baselines that are necessary for the adoption of the E-procurement and follow up to ensure implementation. The study also recommended that due to the sensitivity of the government data and the legal nature of orders and payments, security of data should be enhanced.