Dumont, IA -- U.S. city in Iowa Population (2000): 676 Housing Units (2000): 316 Land area (2000): 1.754008 sq. miles (4.542859 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.754008 sq. miles (4.542859 sq. km) FIPS code: 22620 Located within: Iowa (IA), FIPS 19 Location: 42.749475 N, 92.972272 W ZIP Codes (1990): 50625 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dumont, IA Dumont