| North Branch Millers River | |
| Pushpin Map: | Massachusetts#New Hampshire#USA |
| Pushpin Map Size: | 250 px |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | States |
| Subdivision Name2: | New Hampshire, Massachusetts |
| Subdivision Type3: | Counties |
| Subdivision Name3: | Hillsborough, NH, Cheshire, NH, Worcester, MA |
| Subdivision Type4: | Towns |
| Subdivision Name4: | New Ipswich, NH, Rindge, NH, Winchendon, MA |
| Length: | 6miles |
| Source1: | Mountain Pond |
| Source1 Location: | New Ipswich, NH |
| Source1 Coordinates: | 42.7486°N -71.93°W |
| Source1 Elevation: | 383order=flipNaNorder=flip |
| Mouth: | Whitney Pond, Millers River |
| Mouth Location: | Winchendon, MA |
| Mouth Coordinates: | 42.6817°N -72.0281°W |
| Mouth Elevation: | 972feet |
The North Branch of the Millers River is a river in southwestern New Hampshire and northern Massachusetts in the United States. It is a tributary of the Millers River, which flows west to the Connecticut River, which in turn flows south to Long Island Sound, an arm of the Atlantic Ocean.
The North Branch rises in New Ipswich, New Hampshire, at the outlet of Mountain Pond. It flows west through Island Pond into Rindge, and passes the villages of East Rindge and Converseville to Lake Monomonac. From the lake's outlet in Massachusetts, the North Branch flows south parallel to U.S. Route 202, joining the Millers River at Whitney Pond in Winchendon.
The North Branch is long, of which are in New Hampshire,[1] with in Massachusetts. If the channel length of through Lake Monomonac were included, the total length would be .