This study investigates the effects of knowledge-culture, organizational infrastructure, technical infrastructure, management support, vision clarity, reward policy and economic return on KMS success in Omani organizations. Results show that all investigated factors contribute to KMS success except for reward policy. Factors such as training and matching users’ needs are also critical. Results suggest that KMS success factors in Oman are relatively like those in western countries, and other developing countries. However, because they operate in developing countries, IT managers in Oman consider that reward-policy is not feasible to promote KMS use.