Altamont, SD -- U.S. town in South Dakota Population (2000): 34 Housing Units (2000): 18 Land area (2000): 1.263638 sq. miles (3.272808 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.263638 sq. miles (3.272808 sq. km) FIPS code: 01140 Located within: South Dakota (SD), FIPS 46 Location: 44.840343 N, 96.690475 W ZIP Codes (1990): 57226 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Altamont, SD Altamont