Population administration is regulated in Law Number 23 of 2006 and has been amended by Law Number 24 of 2013 concerning Amendments to Law Number 23 of 2006 concerning Population Administration. This study aims to determine the importance of communication and information and what factors play a role in implementing the policy implementation of regional regulation number 21 of 2014 concerning population in Banjarmasin City. The research method uses a qualitative approach and descriptive type. The research instrument is the researcher himself. The data collection techniques are observation, interview and documentation. The focus of research is using the theory of policy implementation by Marille S. Grindle. Data analysis used is data reduction, data presentation and verification. The validity of the data used by the data credibility test technique using triangulation to test it. The results show that communication and information are very important elements in the implementation of policies for implementing regional regulation number 21 of 2014. However, there are things that have not been maximally implemented regarding the effectiveness of population administration in the city of Banjarmasin (case study on temporary residence certificates). Judging from the two factors according to Marille S. Grindle, the factor of Content of Policy, because of the six indicators only one has been successfully implemented, namely the Indicator Program Implementer (Policy Implementer). Meanwhile, other indicators do not work because policy implementers do not know who the institutions are involved, there are still people who do not know the perda so they cannot feel the benefits, how the decision is made. There are three dimensions that are indicators of the importance of communication and information, namely: coordination, integration and synchronization. The context of implementation factor, the three indicators have not been successfully implemented. The reasons for this are lack of socialization and direction from the related agency so that the public does not know the perda, does not know the strategy to be implemented, there are still people who are asked for voluntary funds and the absence of the main duties and functions of each agency. It is suggested to the Department of Population and Civil Registration to provide information and meetings to other policy implementers and in providing SKTS services there should already be main tasks and functions. To the Miai River Village to improve services and hold outreach to the temporary immigrants. The RT Head should have the main tasks and functions (Topuction) and need to record and provide information to the immigrant population. To the immigrants, report themselves to the RT and ask about their obligations.