Most public organizations today are facing problems because they did not at the beginning plan their workforce; neither do they have any functional systematic human resources (HR) planning or program that considers the organizational objectives. This study therefore sought to examine challenges of developing appropriate manpower plans in the Nigerian local government system: The specific objective amongst others is to determine the relationship between manpower planning and the calibers of workers in the Nigerian local government system. The study adopted contingency and trend model of manpower planning as its model of analysis. The study revealed amongst others that there is a positive relationship between manpower planning and the calibers of workers employed in the Nigerian local government system. That conflicting role of various institutions in the affairs of local government affects manpower planning.