Erattupetta is known for its religious diversity and harmony, hosting several significant places of worship:
* **St. George Forane Church, Aruvithura:** One of the most famous and ancient Syrian Catholic churches in Kerala. The patron saint is affectionately called "Aruvithura Vallyachan," and the church draws thousands of pilgrims. * **Mosques:** The town has a large Muslim population and features historic and architecturally significant mosques, such as the Nainar Juma Masjid and the Muhyudheen Juma Masjid. * **Temples:** Prominent Hindu temples include the Nadackal Bhagavathi Temple, which serves as a spiritual center for the local Hindu community.