Contemporary legal systems increasingly face the challenge of accommodating customary norms within state legal frameworks. While state law serves as the primary source of legal authority, customary norms continue to regulate important aspects of social life in many communities. Indonesia and Madagascar provide particularly interesting examples because both countries acknowledge the existence of customary communities while adopting different approaches to their legal recognition. This article examines the place of customary law within the legal systems of Indonesia and Madagascar Comparative doctrinal legal research based on constitutional provisions, legislation and legal scholarship. It analyzes the legal foundations of customary law, the mechanisms through which customary communities are recognized, and the challenges that arise from the coexistence of state law and customary norms and argues that legal recognition alone is insufficient. Effective protection requires institutional mechanisms capable of balancing cultural diversity with the requirements of a modern legal system. The study finds that both countries recognize the importance of customary law, but differ in the degree of formal legal protection granted to customary communities. Indonesia has developed a more explicit constitutional framework, whereas Madagascar relies more heavily on the social legitimacy of customary institutions. Although both jurisdictions formally acknowledge customary law, Indonesia relies on explicit constitutional recognition, whereas Madagascar primarily depends on the continued social legitimacy of customary institutions