This study aimed to identify the reality of knowledge management and identifying the level of effectiveness of activities, and Highlight the role of knowledge management in the quality of decisions. This study relied on the descriptive analytical method. The questionnaire was developed for the purposes of collecting primary data, the study population consists of all government institutions in the Hashemite Kingdom of Jordan and the number of these institutions is 135 government institutions, divided into 13 sectors. A random sample of (200) employees were distributed, from which (182) questionnaires were recovered and considered valid for testing. The findings of this study were: 1-The results showed that the government institutions in Jordan use knowledge management processes (knowledge diagnosis, knowledge planning, knowledge sharing, knowledge acquisition, storage and retrieval of knowledge, organization and follow-up of knowledge). 2-The results of the study showed that the government institutions succeeded during the last five years in achieving their goals through their various activities, taking into account that there is a disparity between the different sectors in the extent to which they achieve those goals. 3- The results showed a significant relationship between the applications of knowledge management and the quality of administrative decisions in government institutions in Jordan, as institutions that practice knowledge management and use it in their organizational life are more effective and able to achieve their goals than other institutions that do not practice knowledge management. In conclusion, this study concluded with a set of recommendations, which were drawn in light of the results, the most important of which was, the Government institutions should exchange knowledge among themselves through meetings, conferences and exchange of experiences.