The first foundation for rendering public assistance. This study aims to examine how population administration connected to public services is implemented using the single identity number policy. The research question is how the political orientation of the single identity number law function would enhance public service administration. The research employed a normative legal methodology to examine the legal politics of Law No. 23 of 2006, as amended to Law No. 24 of 2013. The study's findings demonstrate how the politics of the single identity number law are implemented in population administration by assigning each resident a unique population identification number (NIK), which is valid for their entire life, included in all population documents, and serves as a single identity number for all public service issues. The politics surrounding the "single identity number" law focus on safeguarding residents' legal status, creating a national population database, and leveraging the "single identity number" to enhance public services by allowing public service institutions to integrate and use population data. After partnering with the government, any public service organization can acquire the authorization to access demographic data.