Coordinates: 43°00′35″N 71°28′32″W / 43.0097°N 71.4756°W
Black Brook in 2011 at site of former dam in Manchester, NH
Black Brook is an 11.4-mile-long (18.3 km) stream located in southern New Hampshire in the United States. It is a tributary of the Merrimack River, which flows to the Gulf of Maine.
Black Brook begins at the outlet of Kimball Pond in Dunbarton, New Hampshire. The brook travels southeast into Goffstown and then Manchester, joining the Merrimack just upstream from Amoskeag Falls.