The present study aimed to assess the effects of human resource empowerment on the organizational effectiveness. The nature of the study was descriptive-survey research method with functional purpose of correlation. The study population consisted of 700 staff of Fars Electricity Distribution Company, among whom 155 were determined by Cochran, who were selected by cluster randomization considering the coefficient. Measurement tools in this study included: Spritzer and Mishra empowerment questionnaire (1997), and Parsons organizational effectiveness questionnaire (1998). Despite the standardization, validity and reliability of the tools were re-evaluated that resulted in coefficients of 0.95, and 0.89, respectively. Inferential statistics, used to test the hypothesis, showed that empowerment (sense of competence, self-determination, impact, meaning, and trust) of employees have a significant relationship with their organizational effectiveness. And, empowerment predicted organizational effectiveness. The findings also showed that the most important role among empowerment dimensions in predicting effectiveness is associated with components of competence, trust and effectiveness. تفاصيل المقالة