Crystal Lake, IA -- U.S. city in Iowa Population (2000): 285 Housing Units (2000): 141 Land area (2000): 0.254787 sq. miles (0.659895 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.254787 sq. miles (0.659895 sq. km) FIPS code: 17670 Located within: Iowa (IA), FIPS 19 Location: 43.223564 N, 93.792073 W ZIP Codes (1990): 50432 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Crystal Lake, IA Crystal Lake