Today, organizations are witnessing a destructive phenomenon called enterprise silence. The refusal of employees to provide their ideas and about organizational issues, ultimately leads to organizational degration and recession. This research intends to identify the factors that affect silence in organizations in order to come up with the best solutions to resolve this problem. This is an applied research which is performed by using field method through distributing 81 questionnaire at the Office of Welfare, Co-operation and Social Services of Tehran Municipality - Iran. The reliability of the questionnaire was evaluated 0.78 using Cronbach's alpha coefficient. Data were analyzed using SPSS software and Kolmogorov-Smirnov, Wilcoxon and Spearman correlation tests. The results reviled that at the significant level of 0.05, there is a meaningful difference among the organizational silence dimensions and defensive silence with the hypothesized mean. There is no significant difference in submissive and kindred silence. Respectively, there is a correlation with values of 0.634 and 0.356 between managerial and individual factors with defensive silence. Management, organizational and social factors have been effective in silent subjugation and there is solidarity between the social, organizational and individual factors in altruistic silence. Findings show that there is a considerable defensive silence in the population under investigation and management factors have the greatest impact on its occurrence in the organization.