Bancroft, SD -- U.S. town in South Dakota Population (2000): 37 Housing Units (2000): 15 Land area (2000): 0.234269 sq. miles (0.606753 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.234269 sq. miles (0.606753 sq. km) FIPS code: 03420 Located within: South Dakota (SD), FIPS 46 Location: 44.487523 N, 97.750803 W ZIP Codes (1990): 57316 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Bancroft, SD Bancroft