As the largest archipelagic state in the world, Indonesia has a unique and diverse religious landscape in various aspects. The spread of religions in the country that assimilate with local culture results in the difference of religious life in society. Religious politics run by the government and the rapid development of information technology have increased the complexity of relations between various institutions related to religion. Thus, in this context, the religious phenomenon is often a challenging field to study. This paper aims to examine religious life in Indonesia from a sociological perspective by discussing four main sub-themes: socio-historical development, the relationship between the state and religion, religious-based social conflict, and the impact of information technology on religious life in Indonesia.