Jaffna is predominantly Hindu, specifically adhering to the Saiva Siddhanta tradition, though it has lived alongside strong Christian, Buddhist, and Muslim communities for centuries.
- **Hinduism**: The Nallur Kandaswamy Kovil is the most significant Hindu temple, drawing devotees globally. - **Christianity**: Catholicism and Protestantism have deep historical roots here. St. Mary's Cathedral is a central Catholic landmark, and the district features numerous historic Portuguese and Dutch-era churches. - **Buddhism**: The Nagadeepa Purana Viharaya on Nainativu Island is one of Sri Lanka's holiest Buddhist sites, believed to have been visited by Lord Buddha. - **Islam**: The Jaffna Jumma Mosque serves the local Muslim community, which has been rebuilding its historical presence in the city over the last decade.
