Lone Rock, IA -- U.S. city in Iowa Population (2000): 157 Housing Units (2000): 83 Land area (2000): 0.114742 sq. miles (0.297180 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.114742 sq. miles (0.297180 sq. km) FIPS code: 46290 Located within: Iowa (IA), FIPS 19 Location: 43.221359 N, 94.325090 W ZIP Codes (1990): 50559 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Lone Rock, IA Lone Rock