Lamont, IA -- U.S. city in Iowa Population (2000): 503 Housing Units (2000): 227 Land area (2000): 0.600785 sq. miles (1.556027 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.600785 sq. miles (1.556027 sq. km) FIPS code: 43005 Located within: Iowa (IA), FIPS 19 Location: 42.600022 N, 91.641186 W ZIP Codes (1990): 50650 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Lamont, IA Lamont