Abstract: The purpose of this study was to find out the impact of training and development on organizational performance. Organizations have been spending a substantial portion of their budgets on training and development in the belief that this would translate to an increase in employee productivity. This study was carried out in three companies namely Kenya Power, KenGen and Mumias Sugar Company using a descriptive survey design was adopted in the study. The study population was 5866 employees in the three companies. Results showed that training and development had a significant effect on organizational performance. It is recommended that organizations should provide training and development as important ingredients to improving organizational performance.