Allerton, IA -- U.S. city in Iowa Population (2000): 559 Housing Units (2000): 287 Land area (2000): 1.139951 sq. miles (2.952459 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.139951 sq. miles (2.952459 sq. km) FIPS code: 01270 Located within: Iowa (IA), FIPS 19 Location: 40.707108 N, 93.367263 W ZIP Codes (1990): 50008 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Allerton, IA Allerton