Jenness Pond is a 267-acre water body located primarily in Rockingham County in southern New Hampshire, United States, in the town of Northwood. A small portion of the pond at its northwest end lies in Pittsfield in Merrimack County. The pond's outlet, Jenness Brook (called Narrows Brook farther downstream), is a feeder of Northwood Lake, part of the Suncook River / Merrimack River / Gulf of Maine watershed. Jenness Pond is located just off Route 107 in Northwood. Access may be made at a public, no-fee launch where there is a good, unpaved ramp with some vegetation obstructing it. The shoreline is wooded with light development and a bottom that ranges from mud to sand.