Little Sugar River (New Hampshire)

The Little Sugar River is a 13.5 mi river in western New Hampshire in the United States. It is a tributary of the Connecticut River, which flows to Long Island Sound. The river flows parallel to and approximately 5 mi 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.