Civil service is a vital instrument to the survival of any governmental setting and indeed service delivery. The effectiveness and productivity of any government to a larger extend depends on the efficiency of the civil service. Overtime, the performance of the Civil service has been repleted with varying contradictions in Bauchi State due certain factors. The study is build to assess the performance of Bauchi State Civil Service in service delivery; and to identify the factors undermining the efficiency of Civil Service in promoting service delivery in Bauchi State. Survey research was used as research method; data were collected through primary and secondary sources, data were presented through simple percentage, tables, and content analysis. The finding indicates that Civil Service has a great function to play in promoting service delivery in Bauchi State. The findings also revealed that ideological and innovative factors, economic and political challenges and inadequate teachers are undermining the efficiency of the Civil service in promoting service delivery in Bauchi State. As way forward, there should be proper setting of ideological and innovative factor for the civil service. There should be proper funding of education by providing the basic learning facilities like books, equip laboratories, libraries, technical equipments, teaching aids. Construction of adequate classroom to accommodate the teaming students; and they should be prompt payment of teachers' salaries, and the teachers' salaries need to be increase to make the teaching profession attractive. There should be less political interference in the employment of teachers; merits should be the bases where civil servants are employed. Appointment of head of schools Teachers should be base on merit and seniority in line with civil service rules. Awarding of contract should follow due process and sincerity of purpose. Teachers need to be retrained in order to upgrade their teaching skills. Aptitude test should be conducted among the teachers by and independent and qualified body in order to screen quack teacher and get qualified teachers that can teach in our dear state who can impact the children and close monitoring and supervision should be given to the teachers while discharging their responsibilities in the various places of assignment