|Countries||India and Bangladesh|
|• location||Tripura, India|
|Rajnagar Upazila, Bangladesh|
|Length||117 km (73 mi)|
The Dhalai River (also known as Dhala River) a trans-boundary river in India and Bangladesh. It rises in the mountains of the Indian state of Tripura. It enters Kulaura Upazila of Maulvibazar District of Bangladesh. Later it joins Manu River in Rajnagar Upazila. The co-ordinates of Dhalai River at Ambassa are 23.55'128'' N and 91.51'204'' E in degrees minutesseconds(DMS). It originate from Atharamura Hill and is 117 kilometres (73 mi) long. Some of the popular riverside townships of Dhalai River are the towns of Ambassa, Baralutma and Kamalpur.