| Little Sugar 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: | Sullivan |
| Subdivision Type4: | Towns |
| Subdivision Name4: | Unity, Charlestown |
| Length: | 13.5miles |
| Source1 Location: | Unity |
| Source1 Coordinates: | 43.3125°N -72.2375°W |
| Source1 Elevation: | 530order=flipNaNorder=flip |
| Mouth: | Connecticut River |
| Mouth Location: | North Charlestown |
| Mouth Coordinates: | 43.3075°N -72.3967°W |
| Mouth Elevation: | 87order=flipNaNorder=flip |
| Tributaries Left: | Copeland Brook, Pierce Brook, Swett Brook |
| Tributaries Right: | Meadow Brook, Chase Brook, Sawyer Brook |
The Little Sugar River is a 13.5adj=midNaNadj=mid river in western New Hampshire in the United States.[1] It is a tributary of the Connecticut River, which flows to Long Island Sound. The river flows parallel to and approximately 5miles south of the Sugar River.
The Little Sugar River begins on a tableland in the town of Unity, then drops to the west, cutting a small gorge past the north end of Perry Mountain, and enters the town of Charlestown. The river reaches the Connecticut just west of the village of North Charlestown.