McGregor, IA -- U.S. city in Iowa Population (2000): 871 Housing Units (2000): 487 Land area (2000): 1.308261 sq. miles (3.388380 sq. km) Water area (2000): 0.001829 sq. miles (0.004736 sq. km) Total area (2000): 1.310090 sq. miles (3.393116 sq. km) FIPS code: 48000 Located within: Iowa (IA), FIPS 19 Location: 43.021903 N, 91.179811 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: McGregor, IA McGregor