The purpose of this study is to identify and describe Islamic ideology and the role of Islamic universities in ostering pluralism in society. Participants in the study were Islamic Universities in Indonesia. The research design used is a descriptive antitative approach. Data collection techniques were carried out by means of observation, questionnaires, and documentation using multiple regression analysis. The population in this study is Islamic Universities in Indonesia, as for the sample used in this study as many as 115 respondents. The research was conducted at Islamic Universities with the reasons for the need for observation and knowledge as a reference to Islamic Ideology and the Role of Islamic Universities in Fostering Pluralism in Society. This research method also combines with qualitative research to see the Islamic perspective in the influence of these three variables. Quantitatively, the findings reveal that Islamic ideology and Islamic universities have a positive and significant impact on pluralism in Indonesian society. It can be described that the higher the understanding of Islamic ideology and the role of Islamic universities, the higher the level of pluralism in society in Indonesia. Qualitatively, it was found that, based on the results of observations and interviews with respondents, there is an opinion that the importance of Islamic ideology and the role of Islamic religious universities in influencing the socio-religious life in the community around universities, is real, because the context of Tri Dharma in higher education is a must to be applied in the community and all society members. The role of universities is very important considering the confusion of public understanding related to pluralism. Through education, research and community service, people will be more enlightened about the importance of maintaining tolerance, be it religion, nation and state as a whole.