| Nilganj River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Bangladesh |
| Subdivision Type2: | District |
| Subdivision Name2: | Patuakhali |
| Subdivision Type3: | Upazila |
| Subdivision Name3: | Kalapara |
| Mouth Location: | Andharmanik River |
The Nilganj River is a river in Bangladesh. It is one of the major rivers of Kalapara Upazila in Patuakhali District and flows into the Andharmanik River.[1]