Iroquois, SD -- U.S. city in South Dakota Population (2000): 278 Housing Units (2000): 121 Land area (2000): 0.533636 sq. miles (1.382111 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.533636 sq. miles (1.382111 sq. km) FIPS code: 32020 Located within: South Dakota (SD), FIPS 46 Location: 44.366437 N, 97.850095 W ZIP Codes (1990): 57353 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Iroquois, SD Iroquois