Human resources also influence the organisation's success in carrying out its activities as executors of organizational activities. This research was based on the problem of low Organizational Citizenship Behavior in the Secretariat of Government in 50 Kota Districts. This study aims to analyze the influence of leadership,self-efficacy, and organizational climateon the organizational citizenship behavior of State Civil Apparatus at the Secretariat of Government in 50 Kota Districts, both partially and simultaneously. The population in this study were all State Civil Apparatus at the Secretariat of Government in 50 Kota Districts, with a total of 124 employees. The sampling technique in this study used a proportional random sampling consisted of 95 respondents. Data in this study were collected trough a survey method with a questionnaires. The data analysis technique used in this study was descriptive and quantitative analysis. Testing the hypothesis in this study using a multiple linear regression test. Based on the results of this study, it was known that: 1) Leadership had a positive and significant effect on organizational citizenship behavior of the employees with a significance of 0.000 <0.05. 2) Self-efficacy also had a positive and significant effect on the organizational citizenship behavior of the employees with a significance of 0.000<0.05. 3) Organizational climate also had a positive and significant effect on organizational citizenship behavior of the employees with a significance of 0.000<0.05. 4) Simultaneously, leadership, self-efficacy, and organizational climate also positively and significantly affected the organizational citizenship behavior of the employees or state civil apparatus at the Secretariat of Government in 50 Kota Districts.