Buffalo, IA -- U.S. city in Iowa Population (2000): 1321 Housing Units (2000): 516 Land area (2000): 6.017258 sq. miles (15.584627 sq. km) Water area (2000): 0.033269 sq. miles (0.086166 sq. km) Total area (2000): 6.050527 sq. miles (15.670793 sq. km) FIPS code: 09235 Located within: Iowa (IA), FIPS 19 Location: 41.459231 N, 90.721244 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Buffalo, IA Buffalo