Iowa Falls, IA -- U.S. city in Iowa Population (2000): 5193 Housing Units (2000): 2412 Land area (2000): 4.978662 sq. miles (12.894675 sq. km) Water area (2000): 0.067805 sq. miles (0.175615 sq. km) Total area (2000): 5.046467 sq. miles (13.070290 sq. km) FIPS code: 38640 Located within: Iowa (IA), FIPS 19 Location: 42.522136 N, 93.267289 W ZIP Codes (1990): 50126 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Iowa Falls, IA Iowa Falls