This study examines the effectiveness of oversight institutions in Libya and their role in monitoring public policy implementation. It adopts a descriptive-analytical approach covering public policy concepts, administrative control frameworks, institutional structures, practical performance, and constraints. The findings indicate that although Libya possesses a formal legal and institutional oversight system, its effectiveness remains limited due to political fragmentation, weak governance, overlapping mandates, and legal and technical constraints. A significant gap exists between legal provisions and actual implementation, negatively affecting administrative efficiency and anti-corruption efforts. The study recommends strengthening institutional independence, updating regulatory frameworks, and developing digital and information-based oversight systems to improve public policy implementation effectiveness. Keywords: oversight institutions, public policy, Libya, governance, Audit Bureau, accountability, administrative corruption.