Montgomery -- U.S. County in Iowa Population (2000): 11771 Housing Units (2000): 5399 Land area (2000): 423.881594 sq. miles (1097.848242 sq. km) Water area (2000): 0.931368 sq. miles (2.412232 sq. km) Total area (2000): 424.812962 sq. miles (1100.260474 sq. km) Located within: Iowa (IA), FIPS 19 Location: 41.013101 N, 95.159253 W Headwords: Montgomery Montgomery, IA Montgomery County Montgomery County, IA