Maratua Island, located in the Berau Regency of East Kalimantan, Indonesia, primarily follows Islam.
The majority of the island's population adheres to the Islamic faith, which is also the dominant religion throughout Indonesia. The island's cultural and religious practices are deeply intertwined, with Islamic traditions playing a significant role in daily life.
While Islam is the prevalent religion, there might be a small number of individuals practicing other faiths on the island. However, the dominant religious influence on Maratua Island remains Islam.