St. Charles, IA -- U.S. city in Iowa Population (2000): 619 Housing Units (2000): 253 Land area (2000): 0.561886 sq. miles (1.455277 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.561886 sq. miles (1.455277 sq. km) FIPS code: 69915 Located within: Iowa (IA), FIPS 19 Location: 41.287857 N, 93.807982 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: St. Charles, IA St. Charles