Isabel, SD -- U.S. town in South Dakota Population (2000): 239 Housing Units (2000): 125 Land area (2000): 0.888116 sq. miles (2.300210 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.888116 sq. miles (2.300210 sq. km) FIPS code: 32140 Located within: South Dakota (SD), FIPS 46 Location: 45.393756 N, 101.430471 W ZIP Codes (1990): 57633 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Isabel, SD Isabel