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. The lake is classified as a warmwater fishery and contains largemouth and smallmouth bass, chain pickerel, and horned pout.