| Johns 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: | Towns |
| Subdivision Name4: | Jefferson, Whitefield, Dalton |
| Length: | 14miles |
| Source1: | Cherry Pond |
| Source1 Location: | Jefferson |
| Source1 Coordinates: | 44.3739°N -71.5189°W |
| Source1 Elevation: | 338order=flipNaNorder=flip |
| Mouth: | Connecticut River |
| Mouth Location: | Dalton |
| Mouth Coordinates: | 44.4264°N -71.6761°W |
| Mouth Elevation: | 255order=flipNaNorder=flip |
| Tributaries Left: | Ayling Brook, Carroll Stream, Bog Brook, Chase Brook |
The Johns River (also called "John's River"), in northern New Hampshire, arises at Cherry Pond in Jefferson and runs approximately, generally northwest, to the Connecticut River.[1] It passes through Hazens Pond, near the Mount Washington Regional Airport, traverses the town of Whitefield, where it is crossed by U.S. Route 3, and then crosses the town of Dalton before joining the Connecticut. It is named for an early hunter and trapper of the area, John Glines, who established a fishing and hunting camp in the area in the 18th century. Another nearby river, the Israel River, is named for John's brother Israel.
The river basin drains numerous small ponds, including Martin Meadow Pond, Weeks Pond, Weed Pond, Clark Pond, Burns Pond (formerly Long Pond), Richardson Pond/Marsh, Hazens Pond, Cherry and Little Cherry Pond, Forest Lake and Mirror Lake (formerly Blake Pond). Tributaries include Chase Brook, Carroll Stream, Bear Brook, Leonard Brook, Cherry Mountain Brook, Carter Brook and Bog Brook. The watershed area is bounded by the eastern slope of the Dalton Mountain Range, the southern slope of Prospect Mountain and the western slope of Cherry Mountain (also called Mount Martha).