Arunapuram has a diverse and harmonious religious makeup, with a highly prominent Syro-Malabar Catholic community, alongside Hindu and Muslim populations.
* **Christianity:** The village is part of the Eparchy of Palai. The Catholic Church has a profound historical and cultural influence here, having established and managed the major educational institutions that define the village. * **Hinduism:** Several local temples serve the Hindu community, with annual temple festivals bringing the wider community together for cultural programs and traditional music. * Religious harmony is a hallmark of the village, with communities mutually participating in major festivals.