The Dharla River () is one of Bangladesh's trans-boundary rivers. It originates in the Himalayas where it is known as the Jaldhaka River, and then it flows through the Jalpaiguri and Cooch Behar districts of West Bengal, India, one of the seven main rivers to do so. Here the river enters Bangladesh through the Lalmonirhat District and joins with the Jaldhaka River and flows as the Dharla River until it empties into the Brahmaputra River near the Kurigram District. Near Patgram Upazila, it again flows easterly back into India. It then moves south and enters Bangladesh again through Phulbari Upazila of Kurigram District and continues a slow meandering course.