Effective internal control reduces the risk of asset loss and helps ensure that plan information is complete and accurate, financial statements are reliable and the plan's operations are conducted in accordance with the provisions of applicable laws and regulations. The purpose of this research is to review and rank factors influencing control environment in internal control systems in public sector in Kerman province. This is an analytical descriptive study including 180 participants from public executive organizations. Research data was collected using a questionnaire. To test and analyse the hypotheses Pearson correlation, linear regression and Friedman ranking test were used in SPSS software. Findings indicate that the integrity and ethical values, commitment to competences, conducive leadership, organizational structure, delegation of authority and responsibility, human resources policy and practice, and the effective role of government internal supervision apparatus, are the factors influencing the control environment in internal control systems in public sector. Moreover integrity and observance of ethical values is the most influencing factor in control environment, requiring specific attention to improve the control environment.