| Pine 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: | Carroll |
| Subdivision Type4: | Towns |
| Subdivision Name4: | Wakefield, Ossipee, Effingham |
| Length: | 19.2miles |
| Source1: | Pine River Pond |
| Source1 Location: | Wakefield |
| Source1 Coordinates: | 43.6461°N -71.0464°W |
| Source1 Elevation: | 584feet |
| Mouth: | Ossipee Lake |
| Mouth Location: | Ossipee |
| Mouth Coordinates: | 44.7719°N -71.1392°W |
| Mouth Elevation: | 407feet |
| Tributaries Left: | Youngs Brook, Poland Brook, Frenchman Brook, Peavey Brook, Beech River |
| Tributaries Right: | Pike Brook, Wilkinson Brook |
The Pine River is a 19.2adj=midNaNadj=mid[1] river located in eastern New Hampshire in the United States. It is a tributary of Ossipee Lake, part of the Saco River watershed leading to the Atlantic Ocean.
The Pine River begins at the outlet of Pine River Pond in Wakefield, New Hampshire. The river almost immediately enters the town of Ossipee and heads northwest through a sandy, pine-forested valley. The Pine River Esker, now mostly excavated by sand and gravel operations, follows the river for over 6miles. The river enters the western corner of Effingham, passing through the Heath Pond Bog Natural Area, then reenters Ossipee 2miles before the river's mouth at Ossipee Lake.
The Beech River is a significant tributary, entering just east of the village of Center Ossipee, one mile upstream from Ossipee Lake. New Hampshire Route 16, while not following the river closely, occupies the same broad, sandy valley.