The purpose of this study is to investigate the social factors affecting the organizational commitment of Tehran Municipality employees. The method of this research is survey and correlation type. The statistical population of this study is all employees of Tehran Municipality. The sampling method is simple random and the sample size is 240 people. The data collection tool and information is a questionnaire, the reliability rate (Cronbach's alpha) of research variables is between 0.80 to 0.92, which indicates the correlation and internal alignment of items. Pearson correlation coefficient, t-test, multivariate regression, analysis of variance and path analysis were used to test the hypotheses. The results of the analysis of hypotheses indicate that there is a positive and significant relationship between social factors, job satisfaction, organizational culture and organizational commitment in Tehran Municipality. The regression results show that 0.239 of the changes are explained by independent variables and the variables of job satisfaction and organizational culture had the greatest impact on increasing organizational commitment. The variable of job satisfaction has the most direct and indirect effect on the organizational commitment. Manuscript profile