Northwood, IA -- U.S. city in Iowa Population (2000): 2050 Housing Units (2000): 982 Land area (2000): 3.780936 sq. miles (9.792580 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 3.780936 sq. miles (9.792580 sq. km) FIPS code: 57630 Located within: Iowa (IA), FIPS 19 Location: 43.445783 N, 93.219123 W ZIP Codes (1990): 50459 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Northwood, IA Northwood