Nash Stream is a 15.3-mile-long (24.6 km)[1] river in northern New Hampshire in the United States.

Nash Stream rises on the western slopes of Whitcomb Mountain in the township of Odell, New Hampshire, and flows west briefly into the town of Columbia before turning south-southwest to flow through Odell and the town of Stratford, joining the Upper Ammonoosuc River in the town of Stark.

The Nash Stream watershed is surrounded by mountains.

The most commonly hiked are North and South Percy Peaks, barren summits offering extensive views reached by a trail, and Sugarloaf, reached by a trail which formerly gave access to a fire tower.

This article related to a river in New Hampshire is a stub.