Belknap -- U.S. County in New Hampshire Population (2000): 56325 Housing Units (2000): 32121 Land area (2000): 401.293095 sq. miles (1039.344300 sq. km) Water area (2000): 67.260688 sq. miles (174.204374 sq. km) Total area (2000): 468.553783 sq. miles (1213.548674 sq. km) Located within: New Hampshire (NH), FIPS 33 Location: 43.515202 N, 71.436077 W Headwords: Belknap Belknap, NH Belknap County Belknap County, NH