This research was conducted to find out how the social construction of the people of Sepaku District towards the development of the National Capital City (IKN). The approach used in this study is a qualitative approach with a phenomenological type of research. Determination of research subjects using purposive sampling techniques. The types of data used are primary data and secondary data. Primary data obtained through observation, interviews, and documentation. Meanwhile, secondary data are obtained from previous research journals, books, news, and archives related to the focus of research. The research location is in Sepaku District, North Penajam Paser Regency. This study used the theory of Social Construction owned by Peter L. Berger and Thomas Luckman. The results of this study show that there are several social constructions of the community towards the development of IKN. This construction is obtained from several stages, namely the process of externalization, objectification, and internalization. The IKN development process, which has been running since the inauguration of the IKN Zero Point in March 2021, has caused various kinds of responses from the community, including people living at the IKN Zero Point. For this reason, there needs to be information between the news in the Mass Media and the reality that occurs in Sepaku District to produce social construction in the local community. It was found that local communities were worried about the legality of the land they lived in and the desire of the local government, so that there would be no development inequality between the buffer area and the location of IKN
