The religious landscape in Longleng is overwhelmingly Christian, reflecting the broader demographic trends of Nagaland.
* **Christianity**: The vast majority of the population belongs to the Baptist denomination. * **Phom Baptist Christian Association (PBCA)**: Headquartered in Longleng, the PBCA is the central religious and administrative body for Baptist churches across the Phom community. It plays a significant role in both spiritual life and socio-economic development in the district. * **Churches**: The Longleng Town Baptist Church is a central landmark and a focal point for community worship, gatherings, and local administration.