| North Branch Upper Ammonoosuc 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: | Milan, Berlin |
| Length: | 11miles |
| Source1 Location: | Milan |
| Source1 Coordinates: | 44.5328°N -71.1978°W |
| Source1 Elevation: | 1470feet |
| Mouth: | Upper Ammonoosuc River |
| Mouth Location: | West Milan |
| Mouth Coordinates: | 44.5944°N -71.3011°W |
| Mouth Elevation: | 978feet |
| Tributaries Right: | Cedar Brook |
The North Branch of the Upper Ammonoosuc River is an 11adj=midNaNadj=mid[1] river in northern New Hampshire in the United States. It is a tributary of the Upper Ammonoosuc River and part of the Connecticut River watershed.
Nearly the entire length of the North Branch is in the town of Milan, New Hampshire. The river briefly enters the city of Berlin, where it passes through Head Pond, then heads north back into Milan, running parallel to the Upper Ammonoosuc until the two rivers join in the village of West Milan. The Androscoggin River, just three miles to the east, flows parallel to the two Upper Ammonoosuc branches, but in the opposite direction. The St. Lawrence and Atlantic Railroad follows the North Branch from Head Pond to West Milan.