This study explores the Influence of Interest Groups on Policy Formulation and Implementation. Interest groups exert a significant influence on both policy formulation and implementation, shaping the legislative and regulatory landscape in diverse ways. These groups, ranging from environmental advocates to business associations, engage in advocacy and lobbying to sway policymakers and affect policy outcomes. During the policy formulation stage, interest groups provide crucial data, research, and expert opinions to legislators, aiming to shape the content and direction of proposed laws. Their efforts are often complemented by strategic campaign contributions and public campaigns designed to build support and pressure decision-makers. Once policies are enacted, interest groups continue to play a vital role in the implementation phase. They influence regulatory processes by engaging with agencies to shape the details of regulations and guidelines. Their impact extends to monitoring policy enforcement and addressing any discrepancies through public reporting or litigation. Additionally, interest groups often collaborate with government bodies to ensure that policies are effectively put into practice. The interaction between interest groups and policymakers reflects a dynamic interplay of resources, expertise, and strategic advocacy. While interest groups help ensure that diverse perspectives are considered, their influence also raises questions about equity and representation in the policy-making process. By understanding the mechanisms through which interest groups operate, we gain insight into the complexities of policy development and the ways in which various interests shape public policy outcomes. This examination highlights the essential role of interest groups in a democratic system while also prompting a critical assessment of their impact on policy equity and effectiveness.