Cottonwood, SD -- U.S. town in South Dakota Population (2000): 6 Housing Units (2000): 5 Land area (2000): 0.921574 sq. miles (2.386866 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.921574 sq. miles (2.386866 sq. km) FIPS code: 14220 Located within: South Dakota (SD), FIPS 46 Location: 43.966333 N, 101.905478 W ZIP Codes (1990): 57775 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Cottonwood, SD Cottonwood