| Dudhnoi River | |
| Pushpin Map: | India Assam#India |
| Subdivision Type1: | State |
| Subdivision Name1: | Meghalaya & Assam |
| Source1: | East Garo Hills |
| Source1 Location: | Meghalaya |
| Source1 Coordinates: | 25.6492°N 90.8166°W |
| Mouth: | Mornoi River |
| Mouth Coordinates: | 26.075°N 90.7547°W |
| Progression: | Dudhnoi River - Krishnai River - Mornoi River - Brahmaputra River |
The Dudhnoi River is a sub-tributary of the Brahmaputra River in the Indian state of Assam. The Dudhnoi River originates in the East Garo Hills of Meghalaya. The Dudhnoi River meets Krishnai River at Matia of Goalpara district and then flows as Mornoi River before its confluence with the Brahmaputra River.[1] Floods in Goalpara district is dictated by the Dudhnoi river.[2]