Sibley, IA -- U.S. city in Iowa Population (2000): 2796 Housing Units (2000): 1244 Land area (2000): 1.611782 sq. miles (4.174496 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.611782 sq. miles (4.174496 sq. km) FIPS code: 72975 Located within: Iowa (IA), FIPS 19 Location: 43.403046 N, 95.746471 W ZIP Codes (1990): 51249 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Sibley, IA Sibley