| West Branch Mohawk River | |
| Pushpin Map: | New Hampshire#USA |
| Pushpin Map Size: | 250 px |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New Hampshire |
| Subdivision Type3: | County |
| Subdivision Name3: | Coos |
| Subdivision Type4: | Towns |
| Subdivision Name4: | Stewartstown, Colebrook |
| Length: | 5.5miles |
| Source1 Location: | Stewartstown |
| Source1 Coordinates: | 44.9422°N -71.385°W |
| Source1 Elevation: | 1670feet |
| Mouth: | Mohawk River |
| Mouth Location: | Kidderville |
| Mouth Coordinates: | 44.8761°N -71.3703°W |
| Mouth Elevation: | 1310feet |
| Tributaries Left: | East Branch |
The West Branch of the Mohawk River is a 5.5adj=midNaNadj=mid[1] river in northern New Hampshire in the United States. It is a tributary of the Mohawk River, which flows west to the Connecticut River, which in turn flows south to Long Island Sound, an arm of the Atlantic Ocean.
The West Branch rises in Stewartstown, New Hampshire, between Mudget Mountain to the north and Lovering Mountain to the south. The river flows south and is joined by the East Branch at the village of Upper Kidderville in the town of Colebrook. The West Branch continues south and joins the Mohawk River in Kidderville, just north of New Hampshire Route 26.