Diu is a secular, multi-faith society with a peaceful coexistence among its communities.
* **Hinduism**: The majority religion. The **Gangeshwar Mahadev Temple**, located in a cave-like formation on the coast, is highly revered; it features five Shiva lingas that are naturally washed by the ocean tides. * **Christianity**: A significant Catholic minority remains from the Portuguese era. **St. Paul's Church** is the primary active parish, while other historic churches are preserved as monuments. * **Islam**: The city has a vibrant Muslim community, with the **Jama Masjid** serving as a central place of worship. * **Jainism & Others**: Smaller communities of Jains and Parsis also reside in the region, contributing to the island's diverse cultural fabric.