Abstract:   Every nation living on Earth has a religious history, which is an essential part of their culture heritage. The religious histories of different nations define their eternal values and principles. India is the home of the Sanatani Hindu religion. So the Sanatani Hindu religion has a profound influence on Indian culture. The present work attempts a detailed study of Religious History in the Uttar Dinajpur District with special reference to the Islampur Subdivision. The influence of the Sanatani Hindu religion is evident in the culture of Islampur subdivision, as the original inhabitants were closely associated with this faith. Numerous idols of Hindu deities have been discovered in the soil of Islampur Subdivision. There are many silent witnesses to the worship of nature here, which is an inseparable part of the local culture. The local influence of various mythological and Epic events are reflected in people's thought and beliefs. The spread of Islam in this area began during the attacks of Muslim rulers. With the change of times, the influence of Islam has increased in this Subdivision.