Waterways play a crucial role in the geography and ecology of the Bongaigaon district.
* **Aie River**: A major tributary of the Brahmaputra, the Aie River flows near Bongaigaon. Known for its clear waters in the winter and volatile flooding in the monsoon, it is a beautiful natural landmark. * **Tunia River**: A smaller waterway that meanders through the district. * **The Brahmaputra River**: Flowing just to the south of the Bongaigaon district (accessible via Jogighopa), it is the main arterial waterway of Assam, heavily influencing the region's climate and topography.
