New Hartford, IA -- U.S. city in Iowa Population (2000): 659 Housing Units (2000): 275 Land area (2000): 0.505410 sq. miles (1.309007 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.505410 sq. miles (1.309007 sq. km) FIPS code: 56145 Located within: Iowa (IA), FIPS 19 Location: 42.567189 N, 92.621435 W ZIP Codes (1990): 50660 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: New Hartford, IA New Hartford