| East Branch Dead Diamond 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: | Town and township |
| Subdivision Name4: | Pittsburg, Atkinson & Gilmanton Academy Grant |
| Length: | 12.7miles |
| Source1 Location: | Pittsburg |
| Source1 Coordinates: | 45.1183°N -71.1233°W |
| Source1 Elevation: | 2580feet |
| Mouth: | Dead Diamond River |
| Mouth Location: | Atkinson & Gilmanton Academy Grant |
| Mouth Coordinates: | 45.0025°N -71.1483°W |
| Mouth Elevation: | 1435feet |
| Tributaries Left: | Laflamme Brook, Boardpile Brook |
The East Branch of the Dead Diamond River is a 12.7adj=midNaNadj=mid river in northern New Hampshire in the United States. It is a tributary of the Dead Diamond River, located in the Androscoggin River watershed of Maine and New Hampshire.[1]
The East Branch of the Dead Diamond River rises in the town of Pittsburg between 3627feet Stub Hill and 3230feet Diamond Ridge. Nearly the entire length of the river is in Pittsburg, with a small portion at its southern end in the Atkinson and Gilmanton Academy Grant. A highlight along the river are the 40adj=midNaNadj=mid Garfield Falls.