St. Charles, ID -- U.S. city in Idaho Population (2000): 156 Housing Units (2000): 106 Land area (2000): 0.637065 sq. miles (1.649992 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.637065 sq. miles (1.649992 sq. km) FIPS code: 71110 Located within: Idaho (ID), FIPS 16 Location: 42.112493 N, 111.390001 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: St. Charles, ID St. Charles