The State-Owned Company called Indonesian Electronic Power Company that provides services to customers and the public in the electricity in Indonesia required to fulfill effective, efficient, timely, and economical public services. The challenge to perform the services were responded by implementing knowledge management (KM) at Indonesian Electronic Power Company since 2008. This study is trying to gets the answer for the following research question: How the implementation of Knowledge Management impact on the organizational performance of Indonesian Electronic Power Company?The study was conducted using a quantitative questionnaire with Indonesian Electronic Power Company employees from different unit in Indonesian Electronic Power Company working areas as respondents. There were ten hypotheses tested, regarding the KM impact to People, Process, Product, and the Organizational Performance. The findings show that each hypothesis is proven with some notes. The result could also be relevant to the other state-owned company that is already implementing KM. © 2019 IEEE.