Roswell, SD -- U.S. town in South Dakota Population (2000): 21 Housing Units (2000): 12 Land area (2000): 1.413775 sq. miles (3.661659 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.413775 sq. miles (3.661659 sq. km) FIPS code: 56420 Located within: South Dakota (SD), FIPS 46 Location: 44.006710 N, 97.695717 W ZIP Codes (1990): 57349 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Roswell, SD Roswell