This study delves into the influence of civil society participation on income inequality, a topic that has received limited scholarly attention. Civil society participation refers to the activities of citizens who organize into various groups, known as civil society organizations, to pursue common interests and goals. These organizations span a wide range, including interest groups, labor unions, spiritual bodies engaging in civic or political activities, social movements, professional associations, charities, and other nongovernmental entities. Our research utilizes an extensive panel dataset, encompassing a global sample of countries from 1975 to 2019. We aim to comprehensively analyze the direct effects of civil society participation on income inequality. Our findings reveal that higher levels of civil society participation are effective in reducing inequality over the short, medium, and long term. These results have significant implications for policymakers. They suggest that encouraging and facilitating civil society participation could be a viable strategy for addressing income inequality. By understanding the dynamics of how civil society engagement influences economic disparities, policymakers can better design and implement measures that promote more equitable economic outcomes. This research contributes to the broader discourse on economic inequality and the potential role of civil society in mitigating it.