Laconia, NH -- U.S. city in New Hampshire Population (2000): 16411 Housing Units (2000): 8554 Land area (2000): 20.278985 sq. miles (52.522328 sq. km) Water area (2000): 6.300647 sq. miles (16.318600 sq. km) Total area (2000): 26.579632 sq. miles (68.840928 sq. km) FIPS code: 40180 Located within: New Hampshire (NH), FIPS 33 Location: 43.550769 N, 71.467935 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Laconia, NH Laconia