New Market, IA -- U.S. city in Iowa Population (2000): 456 Housing Units (2000): 224 Land area (2000): 0.439030 sq. miles (1.137083 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.439030 sq. miles (1.137083 sq. km) FIPS code: 56370 Located within: Iowa (IA), FIPS 19 Location: 40.730414 N, 94.901423 W ZIP Codes (1990): 51646 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: New Market, IA New Market