The relationship between religious preference and financial inclusion in a number of countries around the world still raises questions. Whether religious preference can increase Islamic financial inclusion is the question that this paper seeks to answer. This article attempts to examine four articles on religious preference and Islamic financial inclusion. This research is a library research, using data in the form of books, articles, and the like. Data analysis used is the method of content analysis (content analysis). The content analysis method is used to determine the extent to which religious preferences increase Islamic financial inclusion. The results of the study show that on the one hand religiosity can affect financial inclusion in various states of the United States of America (US) and in various countries globally. However, higher levels of religiosity are negatively correlated with use of financial services across all levels of society. However, on the other hand, there is a significant relationship between one's level of religiosity and one's reasons for saving at an Islamic financial institution. In addition, Islamic financial inclusion is not only driven by religious factors, but also supported by technological sophistication, literacy, political commitment, regulations, and so on. In Indonesia, Islamic financial inclusion, which is still low, can be increased through optimizing the role of Islamic boarding schools with the kiai or ulema as the central figure.