Purpose: This study is based on the importance of the supervisory function of the Regional People's Representative Council (DPRD) in ensuring the transparency, accountability, and effectiveness of regional government performance. In Batam City, various challenges and obstacles are faced by the DPRD in carrying out its supervisory function, such as limited resources, political intervention, low public access to information, and the capacity and competence of DPRD members, which are not yet optimal. This study aims to analyze the effectiveness of the supervisory function of the Batam City DPRD and the incident and to identify the factors that influence its effectiveness.

Method: The research method used is normative juridical through a literature study and an empirical sociological approach through field studies with in-depth interviews, observations, and documentation studies. The respondents included members of the DPRD, local government officials, and representatives of the Batam City community. Data analysis was carried out descriptively by highlighting the key aspects of the supervision process, such as the active involvement of DPRD members, transparency and accountability, local government response, and public participation. Result: The research results show that the effectiveness of the supervision function of the Batam City DPRD faces various obstacles. The active involvement of DPRD members and constructive responses from local governments have proven important in increasing the effectiveness of supervision. However, limited resources, political interference, and lack of public participation are significant obstacles. In addition, the limited access to information, suboptimal capacity, and competence of DPRD members also affect the quality of supervision.